Chlorine DPD (Free & Total), DDPD (Free & Total) and DPD (Hypochlorite) Test Kits & Refills
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Chlorine DPD (Free & Total), DDPD (Free & Total) and DPD (Hypochlorite) Test Kits & Refills

$135.00
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Chlorine DPD (Free & Total), DDPD (Free & Total) and DPD (Hypochlorite) Test Kits & Refills Methods Because of its strong oxidizing properties, chlorine is an excellent 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 Maximum Residual Disinfectant Level for chlorine is 4 mg/L in drinking water. The DPD MethodReferences: 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 exist 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 Activat

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