LaMotte SMART Spectro Spectrophotometer - Manual (Page 98)

PROCEDURE
Use 10 mm square cell adapter
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
16 Cl Free-UDV) from TESTING MENU.
4. Scroll to and select 16 Cl Free-UDV from menu.
5. Rinse a clean vial (0156) with sample water.
6. Use the syringe (1184) to add 3mL of sample to the vial.
7. Insert the vial into chamber, close the lid and select SCAN BLANK.
8. Remove the vial from the Spectro.
9. Use the syringe (1184) to add 3mL of sample to a *Free Chlorine UDV
(4311).
10. Shake vigorously until powder dissolves completely.
NOTE: If powder residue remains in the bottom of the vial after inverting or air
bubbles form, invert once more and tap bottom of vial sharply once or twice to
dislodge powder and bubbles. Mix.
11. Immediately insert tube into chamber, close lid and select SCAN SAMPLE.
Record result in ppm free chlorine.
12. Press OFF button to turn the spectrophotometer off or press EXIT button 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 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.
SMART Spectro Test Procedures 2.11 CHLORINE-FREE, UDV
Test P
rocedures