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DR/2400
Method 10069
Multi-pathlength Cell
Scope and Application:
hypochlorite ion) in drinking water, cooling water, and industrial process waters
* Adapted from Standard Methods for the Examination of Water and Wastewater.
Tips and Techniques
• Analyze samples immediately. Do not preserve for later analysis.
• After adding the DPD reagent, a pink color will develop if chlorine is present.
• If the chlorine concentration is less than 2 mg/L, use Method 8021, program number 80.
• Install the Multi-pathlength Cell into the adapter oriented for the short (1-cm) pathlength (the long pathlength is perpendicular to
the front of the instrument).
DR/2400 Multi-Path Cell
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
88 Chlor. F&T HR
Touch
.
Start
ChlorineFre_MP_High_DPD_Eng_2400.fm
For testing higher levels of free chlorine (hypochlorous acid and
2.
Fill the
multi-pathlength cell to
the 5-mL line with
sample.
Chlorine, Free
HR (0.1 to 10.0 mg/L as Cl
3.
Install the adapter.
Wipe the cell. Place the
cell into the cell adapter
and orient it for the short
pathlength.
Note: See Section 2.6.1
Installing Sample Cell Adapters
in the Instrument Manual for
adapter installation details.
DPD Method*
2
Method 10069
Zero
4.
Touch
.
Zero
The display will show:
0.0 mg/L Cl
2
Chlorine, Free
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