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Chlorine DPD Tablet Colorimeter Test Kit Lamotte |
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Product Features |
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Range |
0 to 4.0 ppm Chlorine ( may be extended by dilution ) |
Method |
In the absence of Iodide, Free Available Chlorine reacts instantly with buffered diethyl-p-phenylenediamine indicators ( DPD ) to produce red color in proportion to amount of chlorine present |
Subsequent addition of potassium iodide produces rapid color response from the combined forms of chlorine ( chloramines ) |
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Handling/Preservation |
Chlorine in aqueous solutions, particularly weak solutions, is not stable |
Exposure to sunlight or agitation will accelerate reduction of chlorine |
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Fill sample containers to top and cap tightly |
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Analyze samples as soon as possible after collection |
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Interferences |
The only interfering substance likely to be encountered is oxidized manganese |
The extent of this interference can be determined by treating samples with sodium arsenite to destroy present chlorine present, so that amount of interference can be measured |
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Calibration |
The single test colorimeter is precalibrated |
In order to comply with NPDWR or NPDES reporting regulations, calibration should be checked periodically by using reference standards, including a 0 mg/L blank and 0.3, 1.0, and 3.5 mg/L chlorine |
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Consult local regulatory agency to determine best practices and procedures to prepare necessary standards |
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Applications |
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Drinking water supplies |
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Water distribution systems |
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Swimming pools |
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Spas |
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Sewage |
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Chlorinated waste waters |
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Processed waters |
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Sanitizing solutions |