Lamotte SMART3 Colorimeter User Manual download pdf (Page 270)

PROCEDURE

1. Press and hold until colorimeter turns on.

2. Press

ENTER

to select TESTING MENU.

3. Select ALL TESTS (or another sequence containing 083 Potassium) from

TESTING MENU.

4. Scroll to and select 083 Potassium from menu.

5. Rinse a clean 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 colorimeter. Add 4 drops of *Sodium Hydroxide, 1.0N

(4004WT). Cap and mix.

8. Use the 0.05 g spoon (0696) to add one measure of *Tetraphenylboron Powder

(6364). Cap and shake vigorously until all of the powder has dissolved. Wait 5

minutes.

9. At end of 5 minute waiting period, mix tube again to suspend any settled

precipitate. Insert tube into chamber, close lid and select SCAN SAMPLE.

Record result.

10. Press

to turn colorimeter off or press

EXIT

to exit to a previous menu or

make another menu selection.

NOTES: 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 are obtained.

For the most accurate results, the sample and reagents should be at 25±4°C.

POTASSIUM SMART3 Test Procedures 2.11

Test Procedures

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Lamotte SMART3 Colorimeter User Manual Page 270