LaMotte SMART Spectro Spectrophotometer - Manual (Page 94)

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
18 Cl Total-UDV
) from TESTING MENU.
4. Scroll to and select 18 Cl Total-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 *Total Chlorine UDV
(4312).
10. Shake vigorously until powder dissolves completely.
þNOTE: 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. Wait 2 minutes.
12. Insert tube into chamber, close lid and select SCAN SAMPLE. Record
result in ppm total chlorine.
13. Press
OFF button to turn the spectrophotometer off or press EXIT button
to exit to a previous menu or make another menu selection.
þNOTES: 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.
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 05.04 Chlorine, Total–UDV 3/3