Determination of Iodate by HPLC-UV after On-Line Electrochemical Reduction to Iodide
|
|
- Lionel Bruce
- 5 years ago
- Views:
Transcription
1 Journal of Chromatographic Science 2015;53: doi: /chromsci/bmu053 Advance Access publication July 6, 2014 Article Determination of Iodate by HPLC-UV after On-Line Electrochemical Reduction to Iodide Tao Wang 1, Weimei Lin 2, Xueliang Dai 2, Lijun Gao 1, Bing Wang 2 and Dongqin Quan 1 * 1 Beijing Institute of Pharmacology and Toxicology, Beijing , People s Republic of China, and 2 Beijing Techmate Technology Corporation Limited, Beijing , People s Republic of China *Author to whom correspondence should be addressed. qdqwzb@163.com (D. Q.) These authors contributed equally to this work. Received 6 April 2013; revised 1 May 2014 In this study, a novel on-line pre-column electrochemical instrument (PECI) coupled with high-performance liquid chromatography (HPLC) was developed, and a novel method based on PEC HPLC-UV for amplifying the ultraviolet (UV) response of iodate (IO 3 2 ) was studied. Iodate undergoes reduction in the PECI, and the resulting I 2 was injected to an HPLC system and detected by a UV detector. For IO 3 2 analysis, conditions that can influence the reduction efficiency, including applied potential, ph value and salt concentration, were investigated in detail. In an appropriate condition, the UV response of iodate after passing through PECI was almost 10 times more than that of the initial form with good precision (relative standard deviation %). The detection limit and quantity limit were 9 and 20 ng, respectively. It can be concluded that the proposed method is simple and highly sensitive. reversed-phase or ion chromatography mode column and direct UV detection has been developed for the separation and quantification of periodate, iodate and iodide (8, 9). It is also aimed to develop a new method based on improving the UV absorption of iodate. The purpose of this approach was to develop a novel instrument including pre-column electrochemical instrument (PECI) and coupling it with HPLC-UV to determine IO 3 in iodized salt. In this study, IO 3 undergoes reduction in PECI and produces iodide (I 2 ): IO 3 þ 6e þ 6H þ! I þ 3H 2 O. Then, the resulting I 2 was retained and isolated by a column and detected by an UV detector. The UV response of I 2 is nearly 10 times more than that of IO 3. Therefore, the proposed method is simple and highly sensitive. Introduction Iodine deficiency is the greatest single cause of preventable brain damage and mental retardation (1, 2). Remarkable success has been achieved by common use of iodized salt in China since However, occasional adverse effects occurred. The principal effect is iodine-induced hyperthyroidism (3). Therefore, the China National Standard decided that iodized salt must contain: no less than 25 mg kg 21, and no more than 50 mg kg 21 of iodine. At the very beginning, salt was iodized by the addition of potassium iodide (KI); nowadays, the most common form of iodine in iodized salt is potassium iodate (KIO 3 ). Many methods based on different principles have been proposed for determination of iodate (IO 3 Þ, including spectrophotometry (4, 5), ion chromatography (6) and high-performance liquid chromatography (HPLC) (7). In recent years, ion chromatography has been used to determine iodide in seawater, urine and other natural samples. At the very beginning, ion chromatography equipped with an ultraviolet (UV) detector was developed in which the electrochemical detector (ED) was used to detect the iodide. However, some challenges still exit, in particular the instability of ED. On the other hand, formation of large amount of matrix ions (chloride, sulfate and other organic ions) impedes the determination of the target analysts by the way of saturating the active sites of ion-exchange column; and high price also hinders from spreading the ion chromatography in Chinese laboratories. HPLC with UV detector becomes a more significant method among all the methods of IO 3 analysis and it is more commonly used in conventional analysis laboratories. An HPLC system with a Experimental Apparatus The HPLC-UV system consisted of a 3001 high-pressure pump equipped with a 3010 degasser, a 3002 UV-visible detector, a 3006 autosampler and a 3004 column oven (Shiseido, Tokyo, Japan). A TSK-GEL-NH column (Tosoh, Tokyo, Japan) was used for analysis. The PECI system comprised an HTEC500 high-pressure pump equipped with a dependant degasser, a PEC-500 ED (Eicom, Kyoto, Japan), which was used as the reduction reactor, and a 3011 high-voltage switching six-way valve (Shiseido), which overcomes the high back pressure of the column and protect the electrode and cell in the PECI. The operating conditions for PECI-HPLC-UV are given in Table I. The samples were introduced by the autosampler (Shiseido), transferred by a mobile phase into the reduction reactor and then accommodated in the loop before detecting by the HPLC-UV system. Standard solution and reagents Reverse osmosis-milli Q water (18 MV) (Millipore Corp., Bedford, USA) was used for all solutions and dilutions. The iodide and iodate stock solutions were 1.0 mg ml 21, which were prepared by dissolving g of potassium iodide (Sigma, USA) and g of potassium iodate (Sigma, Milwaukee, USA) in 100 ml of water, respectively. The stock solutions were stored under dark condition at 48C. The working standard solutions were prepared by suitable dilution of the stock solutions with water. # The Author Published by Oxford University Press. All rights reserved. For Permissions, please journals.permissions@oup.com
2 Iodized salt was prepared by adding potassium iodate to sodium chloride (China National Pharmaceutical Group, Beijing, China). Acetonitrile (ACN) was purchased from Fisher Scientific (HPLC grade, Fair lawn, NJ, USA). Analytical grade sodium dihydrogen phosphate and phosphoric acid were bought from China Table I The Operating Conditions for PECI-HPLC-UV PECI system Mobile phase 1 Flow rate 0.2 ml min 21 Applied potential 2600 to 21,700 mv Peek loop volume 200 ml Switch internal time 30 s Cell temperature 358C HPLC-UV system Mobile phase 2 Stationary phase TSK-GEL-NH 2 Flow rate 0.5 ml min 21 Column temperature 358C Detected wavelength 215 nm Sodium dihydrogen phosphate buffer solution (ph , salt concentration mmol L 21 ) Acetonitrile 50 mmol L 21 sodium dihydrogen phosphate buffer solution (ph 3.0) (50 : 50, v/v) National Pharmaceutical Group (Beijing, China). All mobile phases were degassed prior to use either by vacuum or by ultrasonic wave. Procedure A schematic diagram of PECI-HPLC-UV system was illustrated in Figure 1. A PECI, consisting of a pump, a sampler, a high-voltage switching six-way valve and a coulometric ED, was used for online coupling with the HPLC-UV system. As shown in Figure 1, the analyzed chemicals were sent to the HPLC-UV system and detected by the UV detector after passing through the PECI system undergoing a reduction or oxidation. The designed analytical programs included two steps. Initially, when the six-way valve was in LOAD position, and IO 3 was delivered to the cell of the coulometric ED by pump 1 and reduced to I 2 at the electrode in PECI cell filled with mobile phase 1, then the resulting I 2 passed through PCEI and had been collected in the polyether ether ketone (peek) loop (Figure 1A). The process would take 30 s to get ready for the next stage. At step 2, the six-way was immediately switched to INJECT position and then pump 2 transferred the Figure 1. Schematic diagram of PECI-HPLC-UV system: (A) step 1 and (B) step 2. Determination of Iodate by HPLC-UV 281
3 mobile phase 2 to inject I 2 from opposite end of the peek loop to HPLC-UV system for subsequent analysis. I 2 was isolated by the column and detected by the UV detector. The high-voltage switching six-way valve made the cell and electrode of PECI link to atmosphere all the time. Therefore, the PECI on-line coupling with HPLC could avoid the high back pressure of the column (Figure 1B). Operating conditions of the PECI system To meet the requirement of determination, the high reduction efficiency (RE) ofio 3 in PECI was considered as a key target. Three operating conditions that can influence the RE of the PECI system, including applied potential, ph value and salt concentration of mobile phase 1, were investigated in detail. First, 10 mgml 21 of I 2 and IO 3 standard solutions were prepared by diluting their stock solutions with water. Then, IO 3 was analyzed by the PECI-HPLC-UV system in the form of I 2 under different conditions listed in Table II. Then, the RE value was calculated by the following equation: Reduction efficiency (RE) ¼ Amount of I produced Amount of total IO 3 100% where the amount of I 2 produced is calculated as moles of I 2 produced by IO 3 reduction and the amount of total IO 3 is the moles of IO 3 in the standard solution. Result Operating conditions of the PECI system Effect of ph The effect of ph on the RE of IO 3 is shown in Figure 2A. The figure shows that the RE values of IO 3 were very low within ph When ph was adjusted from 4.0 to 2.0, the RE was increased obviously and then kept unchanged when the ph further reduced from 2.0 to 1.0. Effect of potential and salt concentration Figure 2B shows the effect of salt concentration on RE of IO 3. When the salt concentration was changed in the range of mmol L 21, the RE of IO 3 increased from to 70.00%. High salt concentration is not necessary because it can increase the viscosity of electrolysis solution and leading to the slow release of I 2 from the electrode. High salt concentration may also suppress molecule or ion diffusion from the working electrode. The effect of the applied potential on RE was also Table II The Operation Condition Screening of PECI System Factor Level Other condition retained same ph 7.5, 5.0, 4.0, 3.0, 2.0 and mmol L 21 of salt concentration; 21,500 mv of applied potential Salt concentration 50, 120 and 200 mmol L 21 ph 3.0; 21,500 mv of applied potential Applied potential 2600, 2700, 2900, 21,100, 21,500 and 21,700 mv 120 mmol L 21 of salt concentration; ph 3.0 Figure 2. The effect of ph (A), salt concentration (B) and applied potential (C) on reduction deficiency of IO 3 (10.0 mg ml 21 ). 282 Wang et al.
4 investigated, and results were showed in Figure 2C. The more negative applied potential, the more intensive reduction takes place at the electrode. Six levels were designed by us for the applied potential in the study such as 2600, 2700, 2800, 2110, 21,500 and 21,700 mv. The RE value with 21,500 and 21,700 mv was and 67.44%, respectively. Recovery and linearity AsshowninTableIII, the recovery of the method was in the range of % and the relative standard deviation (RSD) was in the range of %. The curves (y ¼ x ) were linear in the range of mg ml 21 for IO 3 with a correlation coefficient of or greater. The detection limit and quantity limit were 9 and 20 ng, respectively. The IO 3 in iodized salt was determined by PECI on-line coupling with high-performance liquid chromatograph (PECI-HPLC), and results are given in Table III (8). Discussion An appropriate ph value can improve the reduction and oxidation at an electrode. In particular, acidic ph is beneficial to reduction and alkaline ph is beneficial to oxidation. According to Faraday s law of electrolysis, the mass of produced substance at an electrode by an electrochemical reaction is proportional to the number of mass of electrons transferred at that electrode. When a molecule or ion undergoes oxidation or reduction in a solution, it may undergo a three-step process: diffusion to the electrode surface, oxidation or reduction and diffusion away from the vicinity of the working electrode. For the first step, IO 3 transferred from the bulk solution to the electrode surface was affected by the flow rate, diffusion coefficient and viscosity of the mobile phase 1. In general, diffusion of ion or molecule in liquid at room temperature is relatively slow, and either too fast or too slow flow of mobile phase 1 is not appropriate for diffusion. Therefore, 358C cell temperature and flow rate 0.2 ml min 21 were chosen in the present study. In the second step, electron transfer is primarily determined by applied potential of the electrode. As shown in Figure 3, the reduction of IO 3 was very weak with applied potential ranging from 2600 to 21,100 mv. With the increasing in applied potential from 21,100 to 21,700 mv, the amount of I 2 increased significantly. To obtain high reduction of IO 3, 200 mmol L 21 sodium dihydrogen phosphate (ph 2.0), mobile phase 1, 21,700 mv applied potential, 0.2 ml min 21 flow rate and 378C cell temperature were selected as operating conditions in this work. The UV response of iodide after reduction is almost 10 times more than that of the initial form (Figure 3). On the other hand, as the iodate was detected through the formation of iodide and this ion can be effectively isolated from chloride in the sample medium, a low interference exists during the analysis. It can be concluded that the method is specific and sensitive by using the PECI instrument under the selected conditions. Conclusion A novel PECI on-line coupled with HPLC was developed, and a novel method based on PEC-HPLC-UV for amplifying the UV response of iodate (IO 3 Þ was described. The proposed method was simple and highly sensitive with good precision. The PECI will be used widely in the field of HPLC analysis in the future. Table III Determination of Potassium Iodate in Salt Iodized (n ¼ 3) Sample Added iodate (mg kg 21 ) Round iodate (mg kg 21 ) Recovery% RSD% Acknowledgments We acknowledge Tijun Zhou of Shiseido China Co., Ltd for his assistance in equipments repair. We also thank Peng Tan and Shangyi Chen of Beijing Techmate Technology Corporation Limited and Haiyan Li of Beijing Institute of Pharmacology and Toxicology for helpful discussions and technical assistance. Figure 3. The chromatography diagram of IO 3 (10.0 mg ml 21 ), initial form (about RT 13.5 min) and after reduction (about RT 8.0 min). References 1. Ranganathan, S., Reddy, V.; Human requirements for iodine & safe use of iodised salt; Indian Journal of Medical Research, (1995); 102: Delange, F., Lecomte, P.; Iodine supplementation: benefits outweigh risks; Drug Safety, (2000); 22: Delange, F., de Benoist, B., Alnwick, D.; Risks of iodine-induced hyperthyroidism after correction of iodine deficiency by iodized salt; Thyroid, (1999); 9: May, W., Wu, D., Eastman, C.P., Maberly, G.; Evaluation of automated urinary iodine methods: problems of interfering substances identified; Clinical Chemistry, (1990); 36: Ford, H.C., Johnson, L.A.; Ascorbic acid interferes with an automated urinary iodide determination based on the ceric-arsenious acid reaction; Clinical Chemistry, (1991); 37: Kumar, S.D., Maiti, B., Mathur, P.K.; Determination of iodate and sulphate in iodized common salt by ion chromatography with conductivity detection; Talanta, (2001); 53: Determination of Iodate by HPLC-UV 283
5 7. Li, H.B., Chen, F., Xu, X.R.; Determination of iodide in seawater and urine by size exclusion chromatography with iodine starch complex; Journal of Chromatography A, (2001); 918: Huang, Z.P., Subhani, Q., Zhu, Z.Y., Guo, W.Q., Zhu, Y.; A single pump cycling-column-switching technique coupled with homemade high exchange capacity columns for the determination of iodate in iodized edible salt by ion chromatography with UV detection; Food Chemistry, (2013); 139(1 4): Sajonz, P.; Separation of periodate, iodate and iodide on a C-18 stationary phase. Dependence of the retention on the temperature and solvent composition. Monitoring of an oxidative cleavage reaction; Chromatographia, (2006); 64: Wang et al.
High Performance Liquid Chromatography
High Performance Liquid Chromatography What is HPLC? It is a separation technique that involves: Injection of small volume of liquid sample Into a tube packed with a tiny particles (stationary phase).
More information7. Stability indicating analytical method development and validation of Ramipril and Amlodipine in capsule dosage form by HPLC.
7. Stability indicating analytical method development and validation of and in capsule dosage form by HPLC. 7.1 INSTRUMENTS AND MATERIALS USED 7.1.1 INSTRUMENTS 1. Shimadzu LC-2010 CHT with liquid chromatograph
More informationA novel approach to the analysis of multivitamin by online supercritical fluid extraction/supercritical fluid chromatography
PO-CON1618E A novel approach to the analysis of multivitamin by online supercritical fluid extraction/supercritical fluid chromatography Pittcon 216 83-12 Qiang Li, Hongyuan Hao, Taohong Huang, Shin-ichi
More informationHigh Pressure/Performance Liquid Chromatography (HPLC)
High Pressure/Performance Liquid Chromatography (HPLC) High Performance Liquid Chromatography (HPLC) is a form of column chromatography that pumps a sample mixture or analyte in a solvent (known as the
More informationVolume 6, Issue 2, January February 2011; Article-015
Research Article DEVELOPMENT AND VALIDATION OF A RP-HPLC METHOD FOR THE DETERMINATION OF DAPOXETINE HYDROCHLORIDE IN PHARMACEUTICAL FORMULATION USING AN EXPERIMENTAL DESIGN Pratik Mehta*, Ujjwal Sahoo,
More informationHPLC Praktikum Skript
HPLC Praktikum Skript Assistants: Gianluca Bartolomeo HCI D330, 3 46 68, bartolomeo@org.chem.ethz.ch Sahar Ghiasikhou HCI E330, 2 29 29, ghiasikhou@org.chem.ethz.ch 1. Introduction In chromatographic techniques,
More informationDetermination of Caffeine by HPLC
Determination of Caffeine by HPLC Introduction It was a long history before real high performance liquid chromatography (HPLC) had evolved. The very first indication of a chromatographic separation was
More informationIntroduction to Pharmaceutical Chemical Analysis
Introduction to Pharmaceutical Chemical Analysis Hansen, Steen ISBN-13: 9780470661222 Table of Contents Preface xv 1 Introduction to Pharmaceutical Analysis 1 1.1 Applications and Definitions 1 1.2 The
More informationDetermination of Trace Cations in Power Plant Waters Containing Morpholine
Application Note 8 Determination of Trace Cations in Power Plant Waters Containing Morpholine INTRODUCTION Morpholine and ammonium are used as additives in power plant waters. Morpholine acts as a corrosion
More informationISSN X CODEN (USA): PCHHAX. Determination of captopril with potassium permanganate chemiluminescence system*
Available online at www.derpharmachemica.com ISSN 975-413X CODEN (USA): PCHHAX Der Pharma Chemica, 16, 8(1):289-293 (http://derpharmachemica.com/archive.html) Determination of captopril with potassium
More informationAvailable online Journal of Chemical and Pharmaceutical Research, 2012, 4(6): Research Article
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2012, 4(6):3275-3279 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 Development and validation of a matrix solid-phase
More informationResearch of Quality Standards for Stachydrine Hydrochloride in Chinese Medicine TJF Granule
Pharmacology & Pharmacy, 2013, 4, 277-282 http://dx.doi.org/10.4236/pp.2013.43040 Published Online June 2013 (http://www.scirp.org/journal/pp) 277 Research of Quality Standards for Stachydrine Hydrochloride
More informationImpact factor: 3.958/ICV: 4.10 ISSN:
Impact factor: 3.958/ICV: 4.10 ISSN: 0976-7908 99 Pharma Science Monitor 9(4), Oct-Dec 2018 PHARMA SCIENCE MONITOR AN INTERNATIONAL JOURNAL OF PHARMACEUTICAL SCIENCES Journal home page: http://www.pharmasm.com
More informationProPac WCX-10 Columns
ProPac WCX-10 Columns Guidance for column use Tips to maximize column lifetime ProPac WCX-10 Column Tips and Tricks This guide provides essential information and invaluable guidelines for mobile phases,
More informationDETERMINATION OF DRUG RELEASE DURING DISSOLUTION OF NICORANDIL IN TABLET DOSAGE FORM BY USING REVERSE PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
CHAPTER 9 DETERMINATION OF DRUG RELEASE DURING DISSOLUTION OF NICORANDIL IN TABLET DOSAGE FORM BY USING REVERSE PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY CHAPTER 9 Determination of drug release during
More informationwith diode array detection
Application Note Small Molecule Pharmaceuticals Analysis of Tween 8 by highperformance liquid chromatography with diode array detection Authors Jianxin Yu, Scott Citrowske, Nikki Carlson, and Jacob Strange
More information--> Buy True-PDF --> Auto-delivered in 0~10 minutes. GB Translated English of Chinese Standard: GB5009.
Translated English of Chinese Standard: GB5009.17-2014 www.chinesestandard.net Sales@ChineseStandard.net NATIONAL STANDARD OF GB THE PEOPLE S REPUBLIC OF CHINA National Food Safety Standard-Determination
More informationChromatography. Gas Chromatography
Chromatography Chromatography is essentially the separation of a mixture into its component parts for qualitative and quantitative analysis. The basis of separation is the partitioning of the analyte mixture
More informationReverse Phase High Performance Liquid Chromatography method for determination of Lercanidipine hydrochloride in bulk and tablet dosage form
Research Article ISSN: 0974-6943 M.V.Kumudhavalli et al. / Journal of Pharmacy Research 2014,8(11), Available online through http://jprsolutions.info Reverse Phase High Performance Liquid Chromatography
More informationDEVELOPMENT OF HPLC METHOD FOR ANALYSIS OF NITRITE AND NITRATE IN VEGETABLE
Journal of Agricultural, Food and Environmental Sciences UDC 635.546.173/.175]:543.544.5.068.7 Original scientific paper DEVELOPMENT OF HPLC METHOD FOR ANALYSIS OF NITRITE AND NITRATE IN VEGETABLE A. Najdenkoska*
More informationCHAPTER V ANALYTICAL METHODS ESTIMATION OF DICLOFENAC. Diclofenac (gift sample from M/s Micro Labs Ltd., Pondicherry)
CHAPTER V ANALYTICAL METHODS ESTIMATION OF DICLOFENAC A UV spectrophotometric method based on the measurement of absorbance at 276nm in phosphate buffer of p H 7.4 was used in the present study of the
More informationCYCLOSERINE Final text for addition to The International Pharmacopoeia. (November 2008) CYCLOSERINUM CYCLOSERINE
December 2008 CYCLOSERINE Final text for addition to The International Pharmacopoeia (November 2008) This monograph was adopted at the Forty-third WHO Expert Committee on Specifications for Pharmaceutical
More informationRP-HPLC Estimation of Trospium Chloride in Tablet Dosage Forms
ISSN: 0973-4945; CODEN ECJHAO E- Chemistry http://www.ejchem.net 2012, 9(3), 1407-1411 RP-HPLC Estimation of Trospium Chloride in Tablet Dosage Forms M. VIJAYA LAKSHMI 1, J.V.L.N.S. RAO 2 AND A. LAKSHMANA
More informationSTABILITY INDICATING METHOD OF RELATED IMPURITIES IN VENLAFAXINE HYDROCHLORIDE SUSTAINED RELEASE TABLETS
Issn No: 976-39 RESEARCH ARTICLE STABILITY INDICATING METHOD OF RELATED IMPURITIES IN VENLAFAXINE HYDROCHLORIDE SUSTAINED RELEASE TABLETS CHETLAPALLI SATYA SRINIVAS 1, P.RENUKA DEVI 2 and GAMPA VIJAYAKUMAR*
More informationFigure 1. Structures for Vitamin B2 and Vitamin B1.
CH 461 & CH 461H F 18 Name Experiment 2C Integrated Laboratory Experiment DETERMINATION OF RIBOFLAVIN: A COMPARISON OF TECHNIQUES PART C. HIGH PERFORMANCE LIQUID CHROMATOGRAPHY The purpose of this experiment
More informationANALYTICAL METHOD PROCEDURES
HPLC ASSAY AND RELATED SUBSTANCE Column Eurospher 100, C18, 25 x 0.40 cm 5µ Mobile Phase Buffer ph 2.0*: Acetonitrile (88:12 v/v) * Buffer ph 2 Potassium dihydrogen phosphate (KH 2 PO 4 ) - 0.68g Hepatane
More informationJournal of Chemical and Pharmaceutical Research, 2017, 9(1): Research Article
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2017, 9(1):118-122 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 Development and Validation of High Performance Liquid
More informationDraft Method proposal: determination of glucoheptonic acid (HGA) in fertilizers.
Draft Method proposal: determination of glucoheptonic acid (HGA) in fertilizers. 1 Scope This document describes a chromatographic method which allows the identification as well as the determination of
More informationA Simple, Novel Validated Stability Indicating RP-HPLC method for estimation of Duloxetine HCl in Capsule Pharmaceutical Formulation
Pharmaceutical Research A Simple, Novel Validated Stability Indicating RP-HPLC method for estimation of Duloxetine HCl in Capsule Pharmaceutical Formulation Manisha Puranik* a, Sailesh Wadher b and Kritika
More informationCHAPTER INTRODUCTION OF DOSAGE FORM AND LITERATURE REVIEW
75 CHAPTER 3 DEVELOPMENT AND APPLICATION OF STABILITY-INDICATING HPLC METHOD FOR THE DETERMINATION OF NEVIRAPINE AND ITS IMPURITIES IN COMBINATION DRUG PRODUCT 3.1 INTRODUCTION OF DOSAGE FORM AND LITERATURE
More informationInternational Journal of Pharmacy and Pharmaceutical Sciences Vol 2, Issue 1, 2010
International Journal of Pharmacy and Pharmaceutical Sciences Vol 2, Issue 1, 2010 RP HPLC ESTIMATION OF EZETIMIBE IN TABLET DOSAGE FORMS NAGARAJU. P *, KRISHNACHAITHANYA. K, CHANDRABABU. D, SRINIVAS.
More informationLUMEFANTRINUM LUMEFANTRINE
July 2008 LUMEFANTRINE: Final text for addition to The International Pharmacopoeia (July 2008) This monograph was adopted at the Forty-second WHO Expert Committee on Specifications for Pharmaceutical Preparations
More informationHydrophilic Interaction Liquid Chromatography: Some Aspects of Solvent and Column Selectivity
Hydrophilic Interaction Liquid Chromatography: Some Aspects of Solvent and Column Selectivity Monica Dolci, Thermo Fisher Scientific, Runcorn, Cheshire, UK Technical Note 20544 Key Words Hydrophilic, HILIC,
More informationHigh Performance Liquid Chromatography
STANDARDBASE techniques: High Performance Liquid Chromatography Drenthe College, The Netherlands 1. Introduction HPLC. High Performance Liquid Chromatography High Performance Liquid Chromatography (HPLC)
More informationAnalysis of Metals, Halides, and Inorganic Ions Using Hydrophilic Interaction Chromatography
Application Note Inorganic Ions, Water Testing, Minerals, Metals, Basic Chemicals Analysis of Metals, Halides, and Inorganic Ions Using Hydrophilic Interaction Chromatography Authors Anne Mack, Adam Bivens
More informationDetermination of trace anions in concentrated hydrofluoric acid
APPLICATION NOTE 78 Determination of trace anions in concentrated hydrofluoric acid Authors Archava Siriraks Thermo Fisher Scientific, Sunnyvale, CA Keywords HF, ICS-5000 +, IonPac AS10, IonPac AC10, ion
More informationCu-Creatinine- Metol system
Quantification of Creatinine in Human Serum using Metol as a Chromogenic Probe Materials and methods 6.1. Reagents 6.1.1. N-methyl-p-aminophenol sulfate N-methyl-p-aminophenol sulfate also denoted as Metol
More informationARTEMETHER AND LUMEFANTRINE TABLETS: Final text for addition to The International Pharmacopoeia (July 2008)
July 2008 ARTEMETER AND LUMEFANTRINE TABLETS: Final text for addition to The International Pharmacopoeia (July 2008) This monograph was adopted at the Forty-second W Expert Committee on Specifications
More informationVALIDATION OF A UPLC METHOD FOR A BENZOCAINE, BUTAMBEN, AND TETRACAINE HYDROCHLORIDE TOPICAL SOLUTION
VALIDATION OF A UPLC METHOD FOR A BENZOCAINE, BUTAMBEN, AND TETRACAINE HYDROCHLORIDE TOPICAL SOLUTION Andrew J. Aubin and Tanya L. Jenkins Waters Corporation, Milford, MA, USA INTRODUCTION Benzocaine (4-Aminobenzoic
More informationHPLC Workshop 16 June 2009 What does this do? Chromatography Theory Review Several chromatographic techniques Even though each method utilizes different techniques to separate compounds, the principles
More informationAppendix II- Bioanalytical Method Development and Validation
A2. Bioanalytical method development 1. Optimization of chromatographic conditions Method development and optimization of chromatographic parameters is of utmost important for validating a method in biological
More informationLow-level Determination of 4-Hydrazino Benzoic Acid in Drug Substance by High Performance Liquid Chromatography/Mass Spectrometry
ISSN: 0973-4945; CODEN ECJHAO E- Chemistry http://www.e-journals.net 2010, 7(2), 403-408 Low-level Determination of 4-Hydrazino Benzoic Acid in Drug Substance by High Performance Liquid Chromatography/Mass
More informationION CHROMATOGRAPHY SYSTEM S 150
ION CHROMATOGRAPHY SYSTEM S 150 WATER ANALYSIS ENVIRONMENTAL ANALYSIS ANION & CATION ANALYSIS ION CHROMATOGRAPHY IIon Chromatography is an analytical separation technique based on ionic interactions. Dissolved
More informationDEVELOPMENT AND VALIDATION OF RP-HPLC METHOD TO DETERMINE CINITAPRIDE HYDROGEN TARTARATE IN BULK AND PHARMACEUTICAL FORMULATION
Research Article ISSN:2230-7346 Journal of Global Trends in Pharmaceutical Sciences Vol.3, Issue 2, pp -619-627, April June 2012 DEVELOPMENT AND VALIDATION OF RP-HPLC METHOD TO DETERMINE CINITAPRIDE HYDROGEN
More informationExtraction Process Validation of Isatis Radix
Pharmacology & Pharmacy,,, - Published Online April in SciRes. http://www.scirp.org/journal/pp http://dx.doi.org/./pp.. Extraction Process Validation of Isatis Radix Junshan Li, Bo Zhang Shineway Pharmaceutical
More informationFigure 1. Structures for Vitamin B2 and Vitamin B1.
CH 461 & CH 461H F 15 Name Experiment 2C Integrated Laboratory Experiment DETERMINATION OF RIBOFLAVIN: A COMPARISON OF TECHNIQUES PART C. HIGH PERFORMANCE LIQUID CHROMATOGRAPHY The purpose of this experiment
More informationGUIDELINES FOR THE DESIGN OF CHROMATOGRAPHIC ANALYTICAL METHODS INTENDED FOR CIPAC COLLABORATIVE STUDY
Page 1 of 13 CIPAC/4105/R GUIDELINES FOR THE DESIGN OF CHROMATOGRAPHIC ANALYTICAL METHODS INTENDED FOR CIPAC COLLABORATIVE STUDY Prepared for CIPAC by Dr M J Tandy*, P M Clarke and B White (UK) The rapid
More informationDetermination of Tetrafluoroborate, Perchlorate, and Hexafluorophosphate in a Simulated Electrolyte Sample from Lithium Ion Battery Production
Determination of Tetrafluoroborate, Perchlorate, and Hexafluorophosphate in a Simulated Electrolyte Sample from Lithium Ion Battery Production Thunyarat Phesatcha, Suparerk Tukkeeree, Jeff Rohrer 2 Thermo
More informationAsian Journal of Research in Chemistry and Pharmaceutical Sciences Journal home page:
Research Article ISSN: 2349 7106 Asian Journal of Research in Chemistry and Pharmaceutical Sciences Journal home page: www.ajrcps.com ESTIMATION OF RAMELTEON IN TABLET DOSAGE FORM BY HPLC M. Jyothsna*
More informationARTEMETHER AND LUMEFANTRINE ORAL SUSPENSION:Final text for addition to The International Pharmacopoeia (November 2008)
November 2008 ` ARTEMETER AND LUMEFANTRINE RAL SUSPENSIN:Final text for addition to The International Pharmacopoeia (November 2008) Category. Antimalarial. Storage. Artemether and lumefantrine oral suspension
More informationEvaluation of Ketone Containing Terpene Compounds using Evaporative Light Scattering Detection
Evaluation of Ketone Containing Terpene Compounds using Evaporative Light Scattering Detection Keywords Introduction Application Note PHA0313 prepels II Detector, Evaporative Light Scattering (ELS), High
More informationJournal of Chemical and Pharmaceutical Research
Available on line www.jocpr.com Journal of Chemical and Pharmaceutical Research ISSN No: 0975-7384 CODEN(USA): JCPRC5 J. Chem. Pharm. Res., 2010, 2(5):399-417 Method develpopment and validation of Hydrochloride
More informationFast methods for the determination of ibuprofen in drug products
APPLICATION NOTE 779 Fast s for the determination of ibuprofen in drug products Authors Sylvia Grosse, Mauro De Pra, Frank Steiner, Thermo Fisher Scientific, Germering, Germany Keywords Pharmaceutical,
More informationDEVELOPMENT AND VALIDATION OF A HPLC METHOD FOR IN-VIVO STUDY OF DICLOFENAC POTASSIUM
IJPSR (2013), Vol. 4, Issue 2 (Research Article) Received on 28 September, 2012; received in revised form, 24 November, 2012; accepted, 23 January, 2013 DEVELOPMENT AND VALIDATION OF A HPLC METHOD FOR
More informationEFFECTS OF MOBILE PHASE COMPOSITION ON THE SEPARATION OF CATECHOLAMINES BY LIQUID CHROMATOGRAPHY WITH ELECTROCHEMICAL DETECTION
Pharmacology EFFECTS OF MOBILE PHASE COMPOSITION ON THE SEPARATION OF CATECHOLAMINES BY LIQUID CHROMATOGRAPHY WITH ELECTROCHEMICAL DETECTION A. ISIMER N. E. BASCI A. BOZKURT S. O. KAYAALP SUMMARY: In this
More informationCHAPTER 19 PARACETAMOL + IBUPROFEN
CHAPTER 19 PARACETAMOL + IBUPROFEN SUMMARY 246 A combination of paracetamol and ibuprofen is marketed in India. Literature survey indicated that one titrimetnc-1-** and one HPLC193 methods are reported
More informationTrace analysis of mesityl oxide and diacetone alcohol in pharmaceuticals by capillary gas chromatography with flame ionization detection
Trade Science Inc. September 2009 Volume 8 Issue 3 ACAIJ, 8(3) 2009 [346-349] Trace analysis of mesityl oxide and diacetone alcohol in pharmaceuticals by capillary gas chromatography with flame ionization
More informationGB Translated English of Chinese Standard: GB NATIONAL STANDARD OF
Translated English of Chinese Standard: GB31604.11-2016 www.chinesestandard.net Buy True-PDF Auto-delivery. Sales@ChineseStandard.net NATIONAL STANDARD OF GB THE PEOPLE S REPUBLIC OF CHINA GB 31604.11-2016
More informationAgilent 1200 Infinity Series HDR DAD Impurity Analyzer System for the Quantification of Trace Level of Genotoxic Impurity
Agilent 12 Infinity Series HDR DAD Impurity Analyzer System for the Quantification of Trace Level of Genotoxic Impurity A case study with degraded omeprazole drug product Application Note Small Molecule
More informationRapid Screening and Confirmation of Melamine Residues in Milk and Its Products by Liquid Chromatography Tandem Mass Spectrometry
Rapid Screening and Confirmation of Melamine Residues in Milk and Its Products by Liquid Chromatography Tandem Mass Spectrometry Application Note Food Authors Jianqiu Mi, Zhengxiang Zhang, Zhixu Zhang,
More informationChemistry 3200 High Performance Liquid Chromatography: Quantitative Determination of Headache Tablets
Chemistry 3200 High Performance Liquid Chromatography: Quantitative Determination of Headache Tablets Liquid chromatography was developed by Tswett in early 1900 s and was shown to be a powerful separation
More informationGB/T Translated English of Chinese Standard: GB/T
Translated English of Chinese Standard: GB/T18204.26-2000 www.chinesestandard.net Sales@ChineseStandard.net NATIONAL STANDARD OF THE GB PEOPLE S REPUBLIC OF CHINA GB/T 18204.26-2000 Methods for determination
More informationDevelopment and Validation of Stability Indicating RP-HPLC Method for the Determination of Anagrelide HCl in Pharmaceutical Formulation
ISSN 0976 3333 Available Online at www.ijpba.info International Journal of Pharmaceutical & Biological Archives 2013; 4(2): 342-346 ORIGINAL RESEARCH ARTICLE Development and Validation of Stability Indicating
More informationInternational Journal of Current Trends in Pharmaceutical Research. International Journal of Current Trends in Pharmaceutical Research
International Journal of Current Trends in Pharmaceutical Research Journal Home Page: www.pharmaresearchlibrary.com/ijctpr Research Article Open Access Development and Validation Levofloxacin Andambroxol
More informationNEVIRAPINE ORAL SUSPENSION Final text for addition to The International Pharmacopoeia (February 2009)
February 2009. NEVIRAPINE ORAL SUSPENSION Final text for addition to The International Pharmacopoeia (February 2009) This monograph was adopted at the Forty-third WHO Expert Committee on Specifications
More informationLiquid storage: Holds the solvent which is going to act as the mobile phase. Pump: Pushes the solvent through to the column at high pressure.
High performance liquid chromatography (HPLC) is a much more sensitive and useful technique than paper and thin layer chromatography. The instrument used for HPLC is called a high performance liquid chromatograph.
More informationShodex TM ODP2 HP series columns
HPLC Columns Shodex TM ODP2 HP series columns Better retention of highly polar substances Technical notebook No. 6 Contents 1. Introduction 1-1. Specifications 1-2. Eluent Compatibility of ODP2 HP Series
More informationInt. J. Pharm. Sci. Rev. Res., 30(2), January February 2015; Article No. 09, Pages: 63-68
Research Article Stability indicating RP-HPLC Method for Determination of FexoFenadine Hydrochloride and its Related Substances in Active Pharmaceutical Substance Abhay Gupta* 1, Dr. Birendra Srivastava,
More informationDeep eutectic solvents as novel extraction media for phenolic. compounds from model oil
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Deep eutectic solvents as novel extraction media for phenolic compounds from model oil Tongnian
More informationIntroduction to biochemical practicals. Vladimíra Kvasnicová
Introduction to biochemical practicals Vladimíra Kvasnicová arrangement of practicals laboratory safety regulations laboratory equipment dealing with automatic pipette instructions: http://vyuka.lf3.cuni.cz/
More informationDevelopment and Validation of a HPLC Method for Chlorphenamine Maleate Related Substances in Multicomponents Syrups and Tablets
Development and Validation of a HPLC Method for Chlorphenamine Maleate Related Substances in s Syrups and Tablets Larisa Alagić-Džambić*, Midhat Vehabović, Edina Čekić, Mirsad Džambić Development Department,
More informationOMCL Network of the Council of Europe QUALITY MANAGEMENT DOCUMENT
OMCL Network of the Council of Europe QUALITY MANAGEMENT DOCUMENT PA/PH/OMCL (11) 04 QUALIFICATION OF EQUIPMENT ANNEX 1: QUALIFICATION OF HPLC EQUIPMENT Full document title and reference Document type
More informationA RP-HPLC METHOD DEVELOPMENT AND VALIDATION OF PARA- PHENYLENEDIAMINE IN PURE FORM AND IN MARKETED PRODUCTS
A RP-HPLC METHOD DEVELOPMENT AND VALIDATION OF PARA- PHENYLENEDIAMINE IN PURE FORM AND IN MARKETED PRODUCTS CH.MOUNIKA*, M.KINNERA Research Article SIR.C.R.REDDY COLLEGE OF PHARMACEUTICAL SCIENCES, ELURU.
More informationModernizing the USP Monograph for Acetaminophen
Modernizing the USP Monograph for cetaophen pplication Note Small Molecule Pharmaceuticals and Generics uthor Rongjie Fu gilent Technologies (Shanghai) Co. Ltd bstract new HPLC method was developed for
More informationMashhour Ghanem 1 and Saleh Abu-Lafi 2 * ABSTRACT ARTICLE INFO
. Journal of Applied Pharmaceutical Science Vol. 3 (10), pp. 051-058, October, 2013 Available online at http://www.japsonline.com DOI: 10.7324/JAPS.2013.31009 ISSN 2231-3354 Validation of a Stability-Indicating
More informationTechnical Procedure for Concentration Determination of Methamphetamine in Liquids via HPLC
Technical Procedure for Concentration Determination of 1.0 Purpose This procedure specifies the required elements for the preparation and use of the Agilent 1100/1200 series High Performance Liquid Chromatograph
More informationMethod Development and Validation Of Prasugrel Tablets By RP- HPLC
Method Development and Validation Of Prasugrel Tablets By RP- HPLC K.Sonia*, Ndwabe Hamunyare, K.Manikandan Department of Pharmaceutical Analysis, SRM College of Pharmacy, SRM University, Kattankulathur,
More informationResearch Article METHOD DEVELOPMENT AND VALIDATION FOR SIMULTANEOUS ESTIMATION OF ELBASVIR AND GRAZOPREVIR BY RP-HPLC
ISSN 2395-3411 Available online at www.ijpacr.com 248 Research Article METHOD DEVELOPMENT AND VALIDATION FOR SIMULTANEOUS ESTIMATION OF ELBASVIR AND GRAZOPREVIR BY RP-HPLC Mantha Vebkatesh* and A. Yasodha
More informationBRIEFING. (EXC: K. Moore.) RTS C Propylparaben C 10 H 12 O Benzoic acid, 4 hydroxy, propyl ester; Propyl p hydroxybenzoate [ ].
BRIEFING Propylparaben. The European Pharmacopoeia is the coordinating pharmacopeia for the international harmonization of the compendial standards for the Propylparaben monograph, as part of the process
More informationApplication Note Pharmaceutical QA/QC. Agilent Application Solution. Authors. Abstract. Syed Salman Lateef Agilent Technologies, Inc.
Agilent Application Solution Transfer of a USP method for tolazamide from normal phase HPLC to SFC using the Agilent 126 Infinity Hybrid SFC/UHPLC System Improving peak shape and providing wider UV selectivity
More informationQuantification of growth promoters olaquindox and carbadox in animal feedstuff with the Agilent 1260 Infinity Binary LC system with UV detection
Quantification of growth promoters olaquindox and carbadox in animal feedstuff with the Agilent 126 Infinity Binary LC system with UV detection Application Note Food Author Srividya Kailasam Agilent Technologies,
More informationStudy on the interaction behavior of catalase with. cephalosporins by chemiluminescence with flow injection
tudy on the interaction behavior of catalase with cephalosporins by chemiluminescence with flow injection analysis Donghua Chen a, Zhuming Wang a,b, Yun Zhang a, Xunyu Xiong a and Zhenghua ong * a a Key
More informationRESOLUTION OENO 33/2004 DETERMINATION OF SHIKIMIC ACID IN WINE BY HPLC AND UV-DETECTION
DETERMINATION OF SHIKIMIC ACID IN WINE BY HPLC AND UV-DETECTION The GENERAL ASSEMBLY, Considering Article paragraph iv of the agreement establishing the International organisation of vine and wine Upon
More informationSchool of Chemistry UNIVERSITY OF KWAZULU-NATAL, WESTVILLE CAMPUS JUNE 2009 EXAMINATION CHEM340: INSTRUMENTAL ANALYSIS.
School of Chemistry UNIVERSITY OF KWAZULU-NATAL, WESTVILLE CAMPUS JUNE 2009 EXAMINATION CHEM340: INSTRUMENTAL ANALYSIS DURATION: 3 HOURS TOTAL MARKS: 100 Internal Examiners: Professor A Kindness Dr T Msagati
More informationDilution(*) Chromatography
WA20264 Poster # 184, HPLC 2002, Montreal, 4-5 June 2002 At-Column Column-Dilution for Preparative Dilution(*) Chromatography Cecilia Mazza, Jie Cavanaugh, Ziling Lu,Tom Sirard,Tom Wheat and Uwe Neue Waters
More informationConstruction and Application of Electrolytic Cell for Iodine Determination
Construction and Application of Electrolytic Cell for Iodine Determination Nasrullah Shah *1, Muhammad Bilal Arian 1, Wajid Ali Khan 1 1 Department of Chemistry, Abdul Wali Khan University Mardan, Pakistan
More informationRadhakrishnan K. et al. / International Journal of Pharmacy & Therapeutics, 3(1), 2012, e- ISSN Print ISSN
e- ISSN 0976-0342 Print ISSN 2229-7456 International Journal of Pharmacy & Therapeutics 73 Journal homepage: www.ijptjournal.com IJPT METHOD DEVELOPMENT AND PARTIAL VALIDATION OF THE RIVASTIGMINE DRUG
More informationDetermination of Carbonyl Compounds In Water by Dinitrophenylhydrazine Derivatization and HPLC/UV*
Determination of Carbonyl Compounds In Water by Dinitrophenylhydrazine Derivatization and HPLC/UV* EPA Method 8315A UCT Part Number: EUC1812M15 (Unendcapped C18-2000 mg/15 ml cartridge) March 2013 Method
More informationPelagia Research Library
Available online at www.pelagiaresearchlibrary.com Der Pharmacia Sinica, 2011, 2 (2): 68-73 ISSN: 0976-8688 CODEN (USA): PSHIBD Method development and validation for determination of methane sulphonic
More informationLuminescence transitions. Fluorescence spectroscopy
Luminescence transitions Fluorescence spectroscopy Advantages: High sensitivity (single molecule detection!) Measuring increment in signal against a dark (zero) background Emission is proportional to excitation
More informationDetermination of Cations and Amines in Hydrogen Peroxide by Ion Chromatography Using a RFIC (Reagent-Free) System
Application Update 55 Determination of Cations and Amines in Hydrogen Peroxide by Ion Chromatography Using a RFIC (Reagent-Free System Introduction Hydrogen peroxide is an essential chemical in the fabrication
More informationJournal of Chemical and Pharmaceutical Research, 2012, 4(6): Research Article. Estimation of zaleplon by a new RP-HPLC method
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2012, 4(6):3010-3014 Research Article ISS : 0975-7384 CODE(USA) : JCPRC5 Estimation of zaleplon by a new RP-HPLC method Tentu.
More informationAnalytical Method Development and Validation of Lafutidine in Tablet dosage form by RP-HPLC
International Journal of ChemTech Research CODEN( USA): IJCRGG ISSN : 0974-4290 Vol. 3, No.3, pp 1403-1407, July-Sept 2011 Analytical Method Development and Validation of Lafutidine in Tablet dosage form
More information*Author for Correspondence
DEVELOPMENT AND VALIDATION OF A SIMPLE UV SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF URAPIDIL HYDROCHLORIDE BOTH IN BULK AND PHARMACEUTICAL FORMULATION *S. Navgire 1, A. Ghadge 2, S. Gurav 2, S.
More informationVoltage-Induced Sample Release from Anion Exchange Supports in Capillary Electrochromatography
1998 The Japan Society for Analytical Chemistry 571 Voltage-Induced Sample Release from Anion Exchange Supports in Capillary Electrochromatography Shinya KITAGAWA and Takao TSUDA Department of Applied
More informationValidated RP-HPLC Method for Estimation of Cefprozil in Tablet Dosage Form
International Journal of PharmTech Research CDEN (USA): IJPRIF ISSN : 0974-4304 Vol.4, No.3, pp 1228-1232, July-Sept 2012 Validated RP-HPLC Method for Estimation of Cefprozil in Tablet Dosage Form Manzoor
More informationComparison of high-speed counter-current chromatography and high-performance liquid chromatography on fingerprinting of Chinese traditional medicine
Journal of Chromatography A, 1022 (2004) 139 144 Comparison of high-speed counter-current chromatography and high-performance liquid chromatography on fingerprinting of Chinese traditional medicine Ming
More informationRP-HPLC Method Development and Validation of Dapagliflozin in Bulk and Tablet formulation
221 IJPAR Volume 2 Issue 4 Oct - Dec -2013 ISSN: 2320-2831 Available Online at: [Research article] RP-HPLC Method Development and Validation of Dapagliflozin in Bulk and Tablet formulation Jeyabaskaran.M
More informationB. Anupama et al. IRJP 2 (1)
INTERNATIONAL RESEARCH JOURNAL OF PHARMACY ISSN 223 847 Available online http://www.irjponline.com Research Article DEVELOPMENT AND VALIDATION OF RP-HPLC METHOD FOR ANALYSIS OF RACECADOTRIL IN PURE AND
More informationFORMALDEHYDE IN URINE by UV Code Z65010
FORMALDEHYDE IN URINE by UV Code Z65010 BIOCHEMISTRY The dose of urinary Formaldehyde is made after exposure to Formaldehyde and Methanol. The Formaldehyde is a pollutant so-called ubiquist, because it
More information