LaMotte SMART Spectro Spectrophotometer - Manual (Page 181)

PROCEDURE
Use universal sample holder.
1. Press and hold ON button until spectrophotometer turns on.
2. Scroll to and select PROGRAMMED TESTS.
3. Scroll to and select ALL TESTS (or another sequence containing
55 Manganese L) from TESTING MENU.
4. Scroll to and select 55 Manganese L from menu.
5. Rinse a 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 Spectro. Use the 1.0 mL pipet (0354) to add 2.0 mL (two
measures) of *Hardness Buffer Reagent (4255). Swirl to mix.
8. Add 2 drops of *Sodium Cyanide, 10% (6565). Cap and mix.
9. Use the 0.5 mL pipet (0369) to add 0.5 mL of *Manganese Indicator Reagent
(3956). Cap and mix.
10. Immediately insert tube into chamber, close lid and select SCAN SAMPLE.
Record result.
11. Press OFF button to turn 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.
MANGANESE, Low Range SMART Spectro Test Procedures 2.11
Test P
rocedures