CHLORMETER visual – DPD Method

The Chlorine and their compounds are very used for the disinfection.
The measure of the residual chlorine is essential.
The level of Chlorine can be expressed in terms of Free Chlorine, Combinated or Total. The  residual Free Chlorine is the most important. The Chlormeter measure the Free Chlorine, Combined or Total in a range of 0 to 2.0mg / l of Cl

 Method 

The test uses the method DPD internationally accepted as the standard method for the determination of Chlorine. In this method the reagents are presented in solution to facilitate their use

The Free Chlorine reacts with diethylparaphenylendiamine (DPD) to produce a pink coloration. The intensity of the colour is proportional to the concentration of Free Chlorine. Next the addition of Potassium Iodide induces an additional reaction with any present Chlorine compound. The intensity of the colour is proportional to the concentration of Total Chlorine; the increment of the colour represents the concentration of Combined Chlorine. The concentration of Chlorine is known as Combined by the difference among Total Chlorine and Free Chlorine. The colour intensity is measured by means of the Taylor comparator with the following scales 0.1 – 0.2 – 0.4 – 0.7 – 1.0 – 1.2 –1.5 and 2.0ppm provided of the real standard solutions in each scale. It includes reagents for 110 tests