Hach POCKET COLORIMETER II Instruction Manual page 19

4.
Use a pipet filler and 2-
mL Class A volumetric pipet
to transfer 2.0 mL of
SPADNS Reagent into each
sample cell. Cap and swirl to
mix.
SPADNS is toxic and
Note:
corrosive; use care while
measuring.
Fluoride, Pipet Method,
HRS MIN SEC HRS MIN SEC
5.
Wait 1 minute.
1—19
continued
6.
Place the blank in the
cell holder.