Hach DR2400 Manual page 144

Chloride
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
5.
Swirl to mix.
25 mL
20 mL
10 mL
9.
Within five minutes
after the timer beeps,
wipe the blank and place
it into the cell holder.
Interferences
Interfering Substance
Extreme pH
Chloride
Page 2 of 4
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
6.
Pipet 1.0 mL of Ferric
Ion Solution into each
sample cell.
Zero
10.
Touch .
Zero
The display will show:
–
0.0 mg/L Cl
Should be about pH 2 after adding reagents.
If the sample is strongly acidic or alkaline, adjust a portion of sample before testing to a pH of
about 7. Use either 5.0 N Sodium Hydroxide Standard Solution (Cat. No. 2450-26) or a 1:5
dilution of perchloric acid (Cat. No. 757-65). Use pH paper (Cat. No. 391-33), as most pH
electrodes will contaminate the sample with chloride.
25 mL 25 mL
20 mL 20 mL
10 mL 10 mL
7.
Swirl to mix. An
orange color will develop
if chloride is present.
25 mL
20 mL
10 mL
11.
Wipe the prepared
sample and place it into
the cell holder.
Interference Levels and Treatments
8.
Touch the timer icon.
Touch .
OK
A two-minute reaction
time will begin.
Read
12.
Touch .
Read
Results will appear in
–
mg/L Cl .
Chloride_None_Other_MRT_Eng_Ody.fm