Introducing the Agilent 7000A QQQ-MS for GC Sunil Kulkarni Product Specialist Agilent Technologies Page 1
Agilent GC/MS Portfolio Smallest footprint, single GC column 5975VL with 6850GC Industry leading GC/MS System 5975C with 7890GC Page 2
Agilent GC/MS Portfolio Smallest footprint, single GC column 5975VL with 6850GC Industry leading GC/MS System 5975C with 7890GC Introducing Page 3
Agilent GC/MS Portfolio 7000A GC/MS/MS Power of MRM Page 4
Agilent 7000A GC/MS/MS 7000A Width 36 cm/14 inches Only 2 inches wider than the 5975C MSD Page 5
GC/MS Triple Quad (QQQ) Carrier Gas (He, H2 ) Collision Gas (Ar, N2, He) Ion Source Ionize Quad 1 Mass Analysis Quad 2 Collision Cell Quad 3 Mass Analysis Detector Elements of a typical triple quadrupole MS system Page 6
Agilent 7000 GC/MS/MS Collision Gas (N2 ) Ion Source Ionize Quad 1 Hexapole Collision Cell Quad 2 Detector Q1 Postfilter Q2 Prefilter The hexapole field has excellent transmission efficiency for precursor and product ions Page 7
What is MRM MS/MS? Multiple Reaction Monitoring EI: many ions from the source Q1 SIM isolate precursor ion Page 8
What is MRM MS/MS? Multiple Reaction Monitoring EI: many ions from the source EI-MS/MS Product 2 Q1 SIM isolate precursor ion Product 3 Product 1 CID + Q2 SIM Page 9
Why MS/MS? Lower detection limits by reducing noise EI: many ions from the source Product ion signal often decreases, but the percentage decrease in noise is much larger for real samples; S/N and detection limits improve Product 2 Q1 SIM isolate precursor before CID Product 3 Product 1 chemical noise eliminated CID + Q2 SIM Product ion measured against zero chemical noise Page 10
Why MS/MS? Greater Selectivity Than SIM EI-SIM selectivity proportional to spectral resolution no selectivity against ions with same m/z interference analyte unit mass resolution Page 11
Why MS/MS? Greater Selectivity Than SIM EI-SIM selectivity proportional to spectral resolution no selectivity against ions with same m/z interference analyte EI-MS/MS Precursor selectivity same as SIM High probability that at least one product ion will be a unique dissociation product of the precursor BUT not the interference Product 2 unit mass resolution Product 3 Product 1 interference Precursor Ion The precursor ion should NOT be used for ion ratios or quantitation since the interferences will be the same as the SIM ion Page 12
Why a GC/MS/MS System? Allows for the selective quantitation of target compounds in high chemical background samples Better S/N in complex matrices than can be achieved by single quadrupole scan or SIM approaches. Newer regulations in some markets specify analytical power commensurate with GC/MS/MS Page 13
Why GC/MS/MS? A Picture Is Worth a Thousand Words 100 fg HCB GC/MS Single Quad SIM MS SIM MS/MS MRM S/N: 116:1 RMS GC/MS/MS QQQ MRM EI 100fg HCB in DIRTY Matrix A chromatographer s dream: single peak on flat baseline Page 14
Why GC/MS/MS? A Picture Is Worth a Thousand Words 100 fg HCB GC/MS Single Quad SIM MS SIM MS/MS MRM S/N: 116:1 RMS GC/MS/MS QQQ MRM EI 100fg HCB in DIRTY Matrix A chromatographer s dream: single peak on flat baseline Page 15
Technology Agilent took the best technologies from their industry leading 597X Series GC/MSD: Heated monolithic gold plated quartz quadrupole Proven reliable high performance source design AUTOTUNE and the 6410A LC/QQQ: Linear acceleration enhanced Collision Cell Wide Mass-Bandwidth QQQ ion optics Mass Hunter software Page 16
Why Heated Quartz Gold Quads? Unlike LC/MS, many high boiling neutral molecules enter the source and manifold of a GC/MS or GC/MS/MS Higher temperature reduces potential for contamination 200C max Virtually eliminates the need to clean quads Low coefficient for thermal expansion for quartz Stable structure during maintenance cycles (hot-cool-hot) for source or detector More stable tunes and methods over a longer period of time in real world sample environments Page 17
GC/QQQ Analyzer Inert, high temp source (same as 5975) Two gold plated quartz, hyperbolic analyzers (same as 5975) Triple-Axis detector (same as 5975) Page 18
GC/QQQ Analyzer Shown with shields for analyzers and collision cell New high performance, hexapole collision cell with patent technology Edwards Split Flow Turbo Page 19
Analyzer Doors Open Inert, 350ºC Source Triple-Axis Detector Page 20
Proven Inert Source Performance Several thousands sources in current use Stay-Clean design extends maintenance intervals with dirty samples Source tune parameters in the Autotune file Dual filament design reduces maintenance intervals Page 21
EI Source Details Partition between source and analyzer compartments Page 22
High Performance Collision Cell Design Linear acceleration design is optimized for high speed performance without ion ghosting or cross-talk MRM speed to 500 MRMs/sec allows determination of more compounds per ion group High sensitivity with wide mass bandwidth eliminates the need to tune on your compound for optimum sensitivity Helium Quenching chemical noise reduction increases S/N Page 23
Collision Cell Details (Cell housing and 2 rods removed for clarity) Quadrupole post-filter Support cradle Quadrupole pre-filter Page 24
High Performance Triple-Axis Detector Ultra low neutrals noise Long life and high linearity Gain Normalization corrects tune file for detector aging to allow repeatable long term method sensitivity Same design as used in the 5975C GC/MSD Page 25
Triple-Axis Detector hyperbolic quartz transmission quadrupole analyzer steering rod shield for secondary particles Offset Z high energy dynode Y ion beam X triple channel electron multiplier Page 26
Autotune Proprietary program tunes the source, mass analyzer, and detector for (as applicable): Ion transmission Mass axis calibration Mass resolution Detector gain vs Voltage Autotune settings are saved with the method for repeatable method performance. Manual Tune override is available Page 27
Agilent 7000A GC/MS/MS OFN (octafluoronaphthalene) Sensitivity 100fg OFN 272:241 Transition 186:1 RMS S/N Page 28
Page 29 One of the many innovations that led to this level of GC/MS/MS sensitivity
Collision Cell Gas Flows 1 ml/min N2 Collision Gas He* + Q1 Ions In Collision Cell Ions Out He* + N 2 N 2 +. + He + e - N 2 +. + A A +. + N 2 Page 30
Collision Cell Gas Flows 1 ml/min N2 Collision Gas He* + Q1 Ions In Collision Cell Ions Out He Buffer Gas He* + He 2 He + heat He* + N 2 N 2 +. + He + e - Page 31
Effect of Helium Quench tested with hexachlorobenzene S/N 341:1 Helium Quench Gas OFF Page 32
Effect of Helium Quench S/N 341:1 Helium Quench Gas OFF Almost 4 X Increase in S/N S/N 1294:1 Helium Quench Gas ON Page 33
Effect of Helium Quench tested with hexachlorobenzene S/N 341:1 Helium Quench Gas OFF Noise Comparison S/N 1294:1 Helium Quench Gas ON The increase in S/N was due to reduction of noise. Page 34
MassHunter MS Workstation Software Modern software interpretation of the proven industry standard GC/MS Chemstation platform Single software platform for all Agilent MS Systems LC/SQ, LC/QQQ, LC/TOF, LC/QTOF GC/SQ, GC/QQQ ICP/MS Page 35
GC/MS/MS Software Modules Acquisition Analysis Excel Reporting Page 36
MS/MS Acquisition Method Editor Dialog Single window acquisition setup Page 37
Agilent G7000A GC/QQQ Outstanding sensitivity 100fg of OFN on column at 100:1 S/N RMS in MS/MS mode using AUTOTUNE parameters verified at customer installation. 1050 amu Mass Range 500 MRM/sec Speed Reliable heated monolithic gold plated hyperbolic quadrupoles Differentially pumped vacuum system New Helium seeded collision cell technology Agilent 7890 GC with Capillary Flow technology. MassHunter Software Page 38