SILICA, Low Range SiLR
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1 SILICA, Low Range SiLR SP-910 Test Method Test Program Description:SP-910 Silica Low Range Method ( ppm SiO 2 ) (Heteropoly Blue Method) Instruments and Reagents: Program 1. SP-910 Portable Water Analyzer 2. 10mL Sample Vial(SP-910,Associated Sample Vial) 3. Pyxis SiLR Reagent(Compatible with HACH reagents and Orbeco reagent) 1. Press OK button (the centre button) on the navigation control panel for 3 seconds until the screen lights up. On the main page, the screen will display eight major feature groups the main menu options. 2. Position the cursor to Mthd icon by navigation buttons and press the OK button to enter Mthd selection interface, position the cursor to SiLR icon
2 Press the OK button to enter SiLR test program interface. 3. Fill two sample cells to the 10-ml line with sample. 4. Add 15 drops of SiLR-1 reagent to each sample cell, Swirl the vial to mix the reagent. Note:For greatest accuracy, hold dropping bottle vertical. 5. Press the ZERO button to zero the instrument and Press the TMR1 button to start the method timer, 4-minute reaction period will begin. Note: Reaction time given is for samples at 20 C (68 F). If the sample temperature is 10 C (50 F), wait 8 minutes. If the sample temperature is 30 C (86 F), wait 2 minutes. 6. After the timer beeps, add the contents of SiLR-2 reagent powder pillow to the each sample cell, Swirl the vial to mix the reagent. 7. Press the TMR2 button to start the method timer, 1-minute reaction period will begin. Phosphate interference is eliminated during this period.
3 Note: Reaction time given is for samples at 20 C (68 F). If the sample temperature is 10 C (50 F), wait 2 minutes. If the sample temperature is 30 C (86 F), wait 30 seconds. 8. After the timer beeps, add the contents of SiLR-3 reagent powder pillow to one of the sample cells (the prepared sample), invert to mix. Note:The sample cell without the SILR Reagent -3 is the blank. 9. Press the TMR3 button to start the method timer, 2-minute reaction period will begin. Note: A blue color will develop if silica is present. 10. After the timer beeps, the cursor will automatically switch to EXIT button. Press the OK button to the icon menu-assisted 11. Use a soft cloth or lint free paper tissue to clean the sample vial. 12. Repeat step 2, place the prepared blank into the Pyxis SP-910 sample vial compartment and press the ZERO button. 13. Place the prepared sample into the Pyxis SP-910 sample vial compartment and press the READ button. 14. Concentration value based on the last absorbance value measured will be calculated and displayed.
4 15. Press EXIT button to return to the main page. 16. When user need to analyze multiple samples of silica, one vial is used to zero the colorimeter, referred as to the prepared blank. Reagents are added to the other vials, referred as to the prepared samples. Press the TMR button to start the method timer Note: This multi-sample method of operation will be affected by the color of the water samples. When water samples have significant color differences or high detection accuracy requirements, you should avoid using the multi-sample method. The method is compatible with HACH 8186 NOTES: 1. Rinse all glassware with 1:1 hydrochloric acid solution. Rinse again with deionized water. 2. When the sample vial is inserted into the sample vial compartment, the triangular mark on the sample vial should be aligned approximately with the 6 o clock position of the sample vial compartment or any position consistently. 3. Pyxis SP-910 automatically turns itself off after 2 minutes with no-button activity, except for during a measurement. Pressing and holding the OK button for 3 seconds will wake up the instrument, and return to the original page if it has any measurement data. 4. Press the CONF button in the method result page to launch the method setup and calibration page. Press the FORM button to select a concentration form from the list of forms (SiO2 or Si).
5 Press the UNIT button to select a concentration unit among the list of ppb, ppm, mg/l, and ug/l.
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