LaMotte SMART3 Colorimeter - Manual (Page 190)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select Testing Menu.
3. Select ALL TESTS (or another sequence containing 048 H Peroxide Shock)
from TESTING MENU.
4. Scroll to and select 048 H Peroxide Shock from menu.
5. Use the pipet (0342) to add 5 drops of the sample water to a tube (0290).
6. Dilute to the 10 mL line with distilled or hydrogen peroxide-free water.
7. Insert the tube into chamber, close lid and select SCAN BLANK.
8. Remove the tube from colorimeter and add 4 drops of *Hydrogen Peroxide
Reagent #1 (6452). Cap and mix.
9. Add one *Hydrogen Peroxide LR Tablet (6454A). Crush tablet with Tablet
Crusher (0175). Cap and mix for 30 seconds. Solution will turn pink if hydrogen
peroxide is present. Wait 5 minutes for full color development.
10. At the end of 5 minute waiting period, mix, insert tube into chamber, close lid
and select SCAN SAMPLE. Record result.
11. Press to turn the meter off or press
EXIT
to exit to a previous menu or
make another menu selection.
NOTES: For best possible results, a 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 is obtained.
For the most accurate results, the sample and reagents should be at 25±4°C.
HYDROGEN PEROXIDE, Shock SMART3 Test Procedures 11.10
Test P
rocedures