LaMotte COD Plus Colorimeter 1922-EX2 - Manual (Page 92)

PROCEDURE
1. Press and hold ON button until colorimeter turns on.
2. Press ENTER to start.
3. Press ENTER to select TESTING MENU.
4. Select ALL TESTS (or another sequence containing 14 Fluoride)
from TESTING MENU.
5. Scroll to and select 14 Fluoride from menu.
6. This test requires a reagent blank. Rinse a clean tube (0290) with clear,
colorless, fluoride free water. Fill to the 10 mL line with clear, colorless,
fluoride free water.
7. Use the 0.5 mL pipet (0353) to add 0.5 mL of *Sodium Arsenite Solution
(4128). Cap and mix.
8. Use the 1.0 mL pipet (0354) to add 2 measures of *Acid-Zirconyl
SPADNS Reagent (3875). Cap and mix thoroughly. (This is the reagent
blank.)
9. Insert tube into chamber, close lid and select SCAN BLANK.
10. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with
sample water. Repeat steps 7 and 8.
11. Insert tube into chamber, close lid and select SCAN SAMPLE. Record
result.
12. Press
OFF button to turn colorimeter off or press EXIT button to exit to a
previous menu or make another menu selection.
COD PLUS TEST PROCEDURES 6/02 FLUORIDE 3/3