LaMotte SMART 2 - Manual (Page 178)

PROCEDURE
1. Press and hold ON button until colorimeter turns on.
2. Press ENTER to start.
3. Press ENTER to select TESTING MENU.
4. Select ALL TESTS (or another sequence containing 55 Manganese
L
) from TESTING MENU.
5. Scroll to and select 55 Manganese L from menu.
6. Rinse a tube (0290) with sample water. Fill to the 10 mL line with sample.
7. Insert tube into chamber, close lid and select SCAN BLANK.
8. Remove tube from colorimeter. Use the 1.0 mL pipet (0354) to add 2.0
mL (two measures) of *Hardness Buffer Reagent (4255). Swirl to mix.
9. Add 2 drops of *Sodium Cyanide, 10% (6565). Cap and mix.
10. Use the 0.5 mL pipet (0369) to add 0.5 mL of *Manganese Indicator
Reagent (3956). Cap and mix.
11. Immediately insert tube into chamber, close lid and select SCAN SAMPLE.
Record result.
12. Press
OFF button to turn colorimeter off or press EXIT button to exit to a
previous menu or make another menu selection.
þ 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.
Manganese–LR 2/2 Smart2 TEST PROCEDURES 2.04