LaMotte SMART3 Colorimeter - Manual (Page 200)

PROCEDURE
1. Press and hold until colorimeter turns on.
2. Press ENTER to select TESTING MENU.
3. Select ALL TESTS (or another sequence containing 053 Iron Phenthro) from
TESTING MENU.
4. Scroll to and select 053 Iron Phenthro from menu.
5. Rinse a clean tube (0290)with sample water. Fill to the 10 mL mark with
sample.
6. Insert tube into chamber, close lid and select SCAN BLANK.
7. Remove the tube from colorimeter. Remove the cap and add 6 drops of
*Acid Phenanthroline Indicator (2776). Cap and invert the tube 4 times to mix
reagents. Wait fi ve minutes for maximum color development.
8. After fi ve minutes, mix, insert tube into chamber, close lid and select SCAN
SAMPLE. Record result as ppm Ferrous Iron.
9. Remove the tube from colorimeter. Use the 0.1g spoon (0699) to add one
measure of *Iron Reducing Reagent (2777). Cap and invert 15 times times to
mix. Wait 5 minutes for maximum color development.
10. After 5 minutes, mix, insert tube into chamber, close lid and select SCAN
SAMPLE. Record result as ppm Total Iron.
11. Press to turn colorimeter off or press
EXIT
to exit to a previous menu or
make another menu selection.
12. Total Iron (ppm) - Ferrous Iron (ppm) = Ferric Iron (ppm)
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, Total, Ferrous, Ferric SMART3 Test Procedures 11.10
Test P
rocedures