LaMotte SMART3 Colorimeter - Manual (Page 110)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 012 Cadmium) from
TESTING MENU.
4. Scroll to and select 012 Cadmium from menu.
5. Rinse a tube (0290) with sample water. Fill to the 10 mL line with sample.
6. Insert the tube into chamber, close lid and select SCAN BLANK.
7. Remove tube from colorimeter. Use the 1.0 mL pipet (0354) to add 1.0 mL of
*Buffered Ammonia Reagent (4020). Swirl to mix.
8. Add two drops of Sodium Citrate, 10% (6253). Swirl to mix.
9. Use a 0.5 mL pipet (0369) to add 0.5 mL of PAN Indicator (4021). Swirl to mix.
10. Use a 0.5 mL pipet (0369) to add 0.5 mL Stabilizing Reagent (4022). Cap and
mix.
11. Immediately insert tube into chamber, close lid and select SCAN SAMPLE.
Record result.
12. Press to turn the 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.
CADMIUM SMART3 Test Procedures 11.10
Test P
rocedures