LaMotte SMART Spectro Spectrophotometer - Manual (Page 219)

PROCEDURE
Use universal sample holder.
1. Press and hold
ON button until spectrophotometer turns on.
2. Scroll to and select PROGRAMMED TESTS.
3. Scroll to and select ALL TESTS (or another sequence containing
86 Silica Hi
) from TESTING MENU.
4. Scroll to and select 86 Silica Hi from menu.
5. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with
sample.
6. Insert tube into chamber, close lid and select SCAN BLANK.
7. Remove tube from Spectro. Add 6 drops *Silica Reagent #1 (V-4466). Cap
and invert to mix.
8. Add 12 drops of *Silica Reagent #2 (V-4467). Cap and mix. Wait 5
minutes.
9. At end of 5 minute waiting period, add 8 drops of *Silica Reagent #3
(V-4468). Cap and mix.
10. Insert tube into chamber, close lid and select SCAN SAMPLE. Record
result.
11. Press
OFF button to turn spectrophotometer off or press EXIT button to
exit to a previous menu or make another menu selection.
þNOTE: To extend the range to 100 ppm, perform a 2:1 dilution of water
sample, with silica-free water. Perform test and multiply result by 2.
Silica–HR 2/2 SMART SPECTRO TEST PROCEDURES 05.04