LaMotte SMART Spectro Spectrophotometer - Manual (Page 83)

PROCEDURE
1. Use universal sample holder.
2. Press and hold ON button until spectrophotometer turns on.
3. Scroll to and select PROGRAMMED TESTS.
4. Scroll to and select ALL TESTS (or another sequence containing
12 Cadmium) from TESTING MENU.
5. Scroll to and select 12 Cadmium from menu.
6. Rinse a tube (0290) with sample water. Fill to the 10 mL line with sample.
7. Insert the tube into chamber, close lid and select SCAN BLANK.
8. Remove tube from Spectro. Use the 1.0 mL pipet (0354) to add 1.0 mL of
*Buffered Ammonia Reagent (4020). Swirl to mix.
9. Add two drops of Sodium Citrate, 10% (6253). Swirl to mix.
10. Use a 0.5 mL pipet (0369) to add 0.5 mL of PAN Indicator (4021). Swirl to
mix.
11. Use a 0.5 mL pipet (0369) to add 0.5 mL Stabilizing Reagent (4022). Cap and
mix.
12. Immediately insert tube into chamber, close lid and select SCAN SAMPLE.
Record result.
13. Press OFF button to turn the spectrophotometer off or press EXIT button 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 SMART Spectro Test Procedures 2.11
Test P
rocedures