Hach DR2400 - Page 162

Chlorine Dioxide
Chlorine Dioxide
Page 2 of 4
ChlorineDio_PP_Low_CPR_Eng_Ody.fm
Interferences
5. Use a Class A pipet to
add exactly 1.00 mL of
Chlorine Dioxide
Reagent 2 to each
cylinder. Stopper.
6. Invert several times
to mix.
7. Use a volumetric
pipet and pipet filler to
add 1.0 mL of Chlorine
Dioxide Reagent 3 to each
cylinder. Stopper.
8. Invert several times
to mix.
9. Pour 25 mL from each
cylinder into round
sample cells.
10. Wipe the blank and
place it into the cell
holder.
11. Touch Zero.
The display will show:
0.00 mg/L ClO
2
12. Wipe the prepared
sample and place it into
the cell holder.
Touch
Read.
Results will appear in
mg/L ClO
2
.
Interfering Substance Interference Levels and Treatments
Highly acidic or alkaline
water
May require 2.0 mL each of Chlorine Dioxide Reagent 1 and Chlorine Dioxide Reagent 3 instead
of 1.0 mL
ClO
–
Greater than 5.5 mg/L
ClO
2
–
Greater than 6 mg/L
ClO
3
–
Greater than 6 mg/L
CrO
4
2–
Greater than 3.6 mg/L
Fe
3+
Greater than 5 mg/L
Hardness Greater than 1000 mg/L
Ozone Greater than 0.5 mg/L
Turbidity Greater than 1000 NTU
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
10 mL
20 mL
25 mL
Zero
10 mL
20 mL
25 mL