Chapter 5
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Orion AQUAfast Reagent Chemistry Instructions for Orion AquaMate
108
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Orion AquaMate Spectrophotometer User Manual
Thermo Scientific
AC2060 Silica Tablet Test
Silicomolybdate Method
0.05 – 4 mg/l SiO
2
1.
Load and run the AC2060 method.
2.
Fill a clean AQUAfast 24mm round vial, Cat. No. AC2V24, with 10 ml of sample. Close the
vial tightly with the cap. Wipe the exterior of the vial.
3.
Place the vial into the holder in the sample chamber and close the chamber door.
4.
Press the Measure Blank function key to measure the blank.
5.
Open the sample chamber door and remove the vial from the holder.
6.
Add one Silica No. 1 Tablet straight from the foil into the vial. Crush the tablet with a clean
stir rod.
7.
Close the vial tightly with the cap and swirl or invert several times until the tablet is
dissolved.
8.
Wait for a reaction period of 5 minutes.
9.
Add one Silica No. 2 Tablet straight from the foil into the vial. Crush the tablet with a clean
stir rod.
10.
Close the vial tightly with the cap and swirl or invert several times until the tablet is
dissolved. Wipe the exterior of the vial.
11.
Wait for a reaction period of 1 minute.
12.
Place the vial into the holder in the sample chamber and close the chamber door.
13.
Press the Measure Sample function key to display the result in mg/l silica.
Notes:
•
The tablets must be added in the correct sequence.