A »The DPD colorimetric method measures chlorine by reacting it with N,N-diethyl-p-phenylenediamine (DPD), producing a pink-colored compound. The intensity of the color is directly proportional to the chlorine concentration, which is then measured using a colorimeter or spectrophotometer to determine the free or total chlorine levels in water samples.

A »The DPD colorimetric method measures chlorine by adding DPD (N,N-diethyl-p-phenylenediamine) to a water sample. When chlorine is present, it reacts with DPD to produce a pink color. The intensity of this color is directly proportional to the chlorine concentration and can be measured using a colorimeter or spectrophotometer, providing a quick and accurate analysis for safe water purification.

A »The DPD colorimetric method measures chlorine by reacting it with N,N-diethyl-p-phenylenediamine (DPD), producing a pink-colored compound. The intensity of the color is directly proportional to the chlorine concentration, which is then measured using a colorimeter to determine the free or total chlorine levels in water samples.