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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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| Most likely, your chlorine level is above the measurement range of the reagents. You’re seeing the reagents react and then get “bleached out” by the remaining chlorine. Try taking another sample, diluting it with an equal portion of distilled or deionized water and re-testing it. Depending upon the initial concentration of chlorine in your sample, you may have to perform several dilutions to get the chlorine down to a readable level. Remember to take the dilutions into account when reporting your chlorine concentration. |
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