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| After adding DPD to my water sample, the water flashed pink and then faded to colorless. What could be happening? |
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| The chlorine level is most likely above the measurement range of the reagents. The reagents react and then become “bleached out” by the remaining chlorine. Try re-sampling and diluting the sample with an equal portion of distilled or de-ionized water before analyzing it again. Depending upon the initial concentration of chlorine in your sample, several dilutions may be required to permit the sample to be read within the readable range of the reagents. Chlorine is a gas dissolved in water, so dilution of samples, requires expediency and prompt analysis. Remember to multiply the reading obtained on the diluted sample by the dilution factor when reporting your chlorine concentrations. |
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