Chemetrics - K-2500 - Chlorine (Free & Total) CHEMets Kit, 0.1-2 ppm

ITEM #: 12644590
Because of its strong o x idizing properties, chlorine is an e x cellent biocide used to treat potable waters, municipal wastes, and swimming pools. When used to treat potable water, chlorine helps alleviate the adverse effects of iron, manganese, ammonia, and sulfide. The Ma x imum Residual Disinfectant Level for chlorine is 4 mg/L in drinking water.
The DPD Method
References: USEPA Methods for Chemical Analysis of Water and Wastes, Method 330.5 (1983). APHA Standard Methods, 23rd ed Method 4500-Cl G- 2000.
In the USEPA-accepted DPD methodology, free chlorine reacts with DPD to form a pink product. When ammonia or amines are present, some of the chlorine may e x ist as combined chlorine. Combined chlorine will not interfere with the free chlorine results, provided the readings are taken at one minute. To determine total chlorine (the sum of free and combined), use the A-2500 Activator Solution (potassium iodide) supplied in the kit. Results are e x pressed as ppm (mg/L) Cl 2 .
The DPD method is also applicable to the direct determination of hypochlorite concentrations in various cleaning preparations and disinfectants prior to their dilution. DPD reacts with hypochlorite ions to form a pink color. Results are e x pressed as percent (%) NaOCl.
The DDPD Method
Reference: Developed by CHEMetrics
The DDPD method is derived from the DPD method. Test kits that employ this chemistry are well suited for use where biocides and chromate corrosion inhibitors are used simultaneously. DDPD reacts with free chlorine to form a purple product. When ammonia or amines are present in the sample, some of the chlorine may e x ist as combined chlorine. To determine total chlorine (the sum of free and combined), use the A-2500 Activator Solution (potassium iodide) that is supplied in the kit. Results are e x pressed as ppm (mg/L) Cl 2 .
WARNING! This product can e x pose you to chemicals including formaldehyde, which is known to the State of California to cause cancer, and methanol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to .
Chlorine (Free & Total) CHEMets Kit, 0.1-2 ppm
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