Lamotte SMART3 Colorimeter User Manual download pdf (Page 217)

PROCEDURE

Use COD/UDV adapter.

1. Press and hold until colorimeter turns on.

2. Press

ENTER

to select TESTING MENU.

3. Select ALL TESTS (or another sequence containing (066 Nitrate UDV) from

TESTING MENU.

4. Scroll to and select 066 Nitrate UDV from menu.

5. Rinse a clean vial (0156) with sample water.

6. Use the syringe (1184) to add 3 mL of sample to the vial.

7. Insert the vial into chamber, close lid and select SCAN BLANK.

8. Remove vial from the colorimeter.

9. Use the syringe (1184) to add 3 mL of sample to a Nitrate UDV vial (4321).

10. Shake vigorously for 30 seconds, then wait 3 minutes.

11. Invert vial once.

NOTE: If powder residue remains in the bottom of the vial after inverting, or if

air bubbles form, invert once more and tap bottom of vial sharply once or twice

to dislodge powder or bubbles. Mix.

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

13. 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.

UDVs from opened pouches should be used promptly. Store unused vials from

opened pouches in the Foil Storage Bag (9467) to extend the shelf life of the

reagent. Generally, UDVs stored in the bag should be used within 10 days if the

humidity is less than 50% and within 5 days if humidity is greater than 50%. The Foil

Storage Bag contains a desiccant pack with indicator. When the indicator in the

window turns from blue to pink, the bag should be replaced.

SMART3 Test Procedures 1.11 NITRATE, UDV

Test Procedures

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Lamotte SMART3 Colorimeter User Manual Page 217