5
4. Scroll to and select
045 Fluoride
from menu.
045 Fluoride
Scan Blank
Scan Sample
12:00:00 001/500
5. This test requires a reagent blank.
Rinse a clean colorimeter tube
(0290) with clear, colorless, Fluoride
free water. Fill to the 10 mL line with
clear, colorless, Fluoride free water.
6. Use the 0.5 mL pipet (0353) to add
0.5 mL of *Sodium Arsenite Solution
(4128). Cap and mix.
7. 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.) Dry the tube with a lint-free
cloth.
8. Insert tube into chamber, close lid
and select
Scan Blank
.
9. Rinse a clean colorimeter tube
(0290) with sample water. Fill to the
10 mL line with sample water.
