Lamotte SMART3 Colorimeter User Manual download pdf (Page 138)

PROCEDURE

1. Press and hold until colorimeter turns on.

2. Press

ENTER

to select TESTING MENU.

3. Select ALL TESTS (or another sequence containing 023 Cobalt) from TESTNG

MENU.

4. Scroll to and select 023 Cobalt from menu.

5. Rinse a tube (0290) with sample water. Fill to 10 mL with sample.

6. Insert the tube into chamber, close lid and select SCAN BLANK.

7. Remove the tube from colorimeter.

8. Use the 1.0 mL pipet (0354) to add 1 mL of *Cobalt Buffer (4852). Cap and

mix.

9. Use the other 1.0 mL pipet (0354) to add 1 mL of *Cobalt Indicator Reagent

(4853). Cap and mix.

10. Wait 3 minutes.

11. Use the 0.5 mL pipet (0353) to add 0.5 mL *Stabilizer Solution (4854). Cap and

invert 15 times to thoroughly mix.

12. Wait 5 minutes. DO NOT MIX.

13. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result in

ppm cobalt.

14. 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.

COBALT SMART3 Test Procedures 11.10

Test Procedures

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Lamotte SMART3 Colorimeter User Manual Page 138