LaMotte SMART3 Colorimeter - Manual (Page 284)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 094 Surfactants) from
TESTING MENU.
4. Scroll to and select 094 Surfactants from menu.
5. Rinse a tube (0290) with sample water. Fill to 10 mL line with sample.
6. Insert the tube into chamber, close lid and select SCAN BLANK.
7. Remove the tube from colorimeter.
8. Use the 0.5 g spoon (0698) to add 0.5 g pH Adjustment Powder (4509). Cap
and mix until powder dissolves.
9. Use the 0.1 g spoon (0699) to add two measures of Sodium Chloride Reagent
(4877). Cap and mix until powder disintegrates.
10. Use the 1.0 mL pipet (0354) to add 2.0 mL of *DS Indicator (4508).
11. Cap and shake for 1 minute.
NOTE: Bubbles on the sides of the tube will interfere with the results. Swirl the
tube to remove bubbles if they are present.
12. Wait 5 minutes. DO NOT MIX.
13. Insert tube into chamber, close lid and select SCAN SAMPLE. Record result in
ppm LAS.
14. Press to turn 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.
SURFACTANTS SMART3 Test Procedures 8.13
Test P
rocedures