LaMotte SMART3 Colorimeter - Manual (Page 194)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 051 Iron Bipyridyl) from
TESTING MENU.
4. Scroll to and select 051 Iron Bipyridyl 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. Use the 0.5 mL pipet (0353) to add one
measure of *Iron Reagent #1 (V-4450). Cap and mix.
8. Use the 0.1 g spoon (0699) to add 0.1 g of *Iron Reagent #2 Powder (V-4451).
Cap and shake vigorously for 30 seconds. Wait three minutes for maximum
color development.
9. At the end of 3 minute waiting period, DO NOT MIX. 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.
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.
IRON, Bipyridyl SMART3 Test Procedures 11.10
Test P
rocedures