LaMotte SMART3 Colorimeter - Manual (Page 184)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 045 Hydrazine) from
TESTING MENU.
4. Scroll to and select 045 Hydrazine 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 colorimeter. Use the 1 mL pipet (0354) to add 4 mL of
*Hydrazine Reagent A (4841). Cap and mix.
8. Use the 0.15 g spoon (0727) to add one measure of *Hydrazine Reagent B
Powder (4842). Cap and shake vigorously for 10 seconds. Wait 2 minutes for
maximum color development. An undissolved portion of Hydrazine Reagent B
may remain in bottom of tube without adversely affecting results.
9. At the end of the 2 minute waiting period, mix, insert tube into chamber, close
lid and select SCAN SAMPLE. Record result.
10. 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 is obtained.
HYDRAZINE SMART3 Test Procedures 11.10
Test P
rocedures