How to know the content of hexavalent chromium in water?

Hexavalent chromium exists in the form of acid radicals, which are mainly orange Cr2O72- in acidic solution and yellow CrO42- in alkaline solution. It has strong oxidizing property in acidic environment. Using this characteristic, it can be used to quantitatively determine iron content in analytical chemistry, and it can also be used to detect whether the driver is drunk and driving. However, its harm to the human body is the focus of our attention, and hexavalent chromium is an ingestion poison/inhalation poison. Then when it invades through the digestive tract, it can cause vomiting and abdominal pain. Dermatitis and eczema can occur on skin penetration. The serious harm is that there is a risk of cancer in long-term or short-term exposure or inhalation. But these are the characteristics of hexavalent chromium, chromium metal, trivalent or tetravalent chromium do not have these toxicity. So how do we know the content of hexavalent chromium in water? The hexavalent chromium on-line analyzer uses acid oxidation to mask the interfering ions and colorimetrically determines the content of hexavalent chromium in water. The pretreated water sample is injected into the colorimetric cell by the syringe pump, and then the masking agent is added to interfere with the influence of the substance, and then the pH of the solution is adjusted, and the characteristic chromogenic agent is added under the appropriate pH condition for color reaction. The degree of color change of the inner solution is directly proportional to the concentration of hexavalent chromium in the water sample. By measuring the color change of the solution, the content of hexavalent chromium in the water sample can be calculated. If the total chromium is to be measured, after the pretreatment, the oxidant is added to the automatic line together to oxidize the chromium in various valence states into hexavalent chromium, and then the colorimetric determination is carried out. If you want to know more about online water quality monitors, please pay attention to BOQU!
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