| Colorimetric method for ozone concentration detection method Colorimetric method is a method for determining ozone concentration based on the degree of coloration or decolorization reaction of ozone with different chemical reagents. According to the colorimetric method, it is divided into artificial colorimetric colorimetric and photometer color . This method is mostly used to detect water dissolved ozone concentration . Domestically, the concentration of ozone dissolved in bottled water is determined by using a colorimetric solution such as potassium iodide or o-methylamine. The method is to determine the ozone solubility value ( 0.05 to 0.08 mg/L ) of the sample by comparing the color liquid tubes of the test sample . If the accuracy is required, the spectrophotometer is used for detection. It is very convenient to use this method to make instruments and prepare standard tools and medicines for on-site sampling. For example , the DPD (dihexyl p-phenylenediamine) color palette of HACH Company of Japan and Japan's Ebara Company ranges from 0.05 to 2 mg/L . American HACH miniature colorimeter uses decolorization reaction of indigo dye. The colorimetric at 600 nm wavelength, the concentration of 0.05 to 0.75 nm/L , shows an accuracy of ± 0.01 nm/L . Less interfered by other oxidants.          |