PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press
ENTER
to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 085 Silica LR) from
TESTING MENU.
4. Scroll to and select 085 Silica LR 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. (See Note)
7. Remove tube from colorimeter. 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. Add 8 drops of *Silica Reagent #3 (V-4468). Cap and mix. Wait 2 minutes.
10. Use the 0.1 g spoon (0699) to add one measure of *Silica Reagent #4 (V-
6284). Cap and mix gently until powder has dissolved. Wait 5 minutes for full
color development.
11. At end of 5 minute waiting period, mix, insert tube into chamber, close lid and
select SCAN SAMPLE. Record result.
12. Press
to turn colorimeter off or press
EXIT
to exit to a previous menu or
make another menu selection.
NOTE: For best possible results, a reagent blank should be determined to account
for any contribution to the test result by the reagent system. To determine the
reagent blank, follow the above test procedure to scan a distilled or deionized
water blank. Then follow the above procedure to perform the test on a distilled or
deionized water sample. This test result is the reagent blank. Subtract the reagent
blank from all subsequent test results of unknown samples. It is necessary to
determine the reagent blank only when a new lot number of reagents are obtained.
SMART3 Test Procedures 11.10 SILICA, Low Range
Test Procedures
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