DR/2400
Chlorine, Free
ChlorineFre_MP_High_DPD_Eng_2400.fm Page 1 of 4
• 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).
Chlorine, Free
Method 10069
DPD Method*
*Adapted from Standard Methods for the Examination of Water and Wastewater.
Multi-pathlength Cell
HR (0.1 to 10.0 mg/L as Cl
2
)
Scope and Application: For testing higher levels of free chlorine (hypochlorous acid and
hypochlorite ion) in drinking water, cooling water, and industrial process waters
1. Touch
Hach Programs.
Select program
88 Chlor. F&T HR.
Touch
Start.
2. Fill the
multi-pathlength cell to
the 5-mL line with
sample.
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.
4. Touch Zero.
The display will show:
0.0 mg/L Cl
2
Tips and Techniques
DR/2400 Multi-Path Cell Method 10069
Hach Programs
Zero
To Next Page
Loading...
