When it comes to chromium, its chemical symbol is Cr, and its elemental substance is steel-gray metal. It exists in nature mainly in the form of chromite FeCr204, which is reduced by chromium oxide with aluminum, or obtained by electrolysis from chromite alum or chromic acid. According to the content of the Earth’s crust, chromium is one of the most widely distributed elements. So what harm does it do to people in the water? What equipment is needed to detect the need in water? This chapter water quality online monitoring instrument manufacturers to understand together with you!
About chromium pollution, it not only threatens the quality and safety of drugs, but also threatens the life and safety of the public! (For example, wastewater from industrial production such as chromium smelting, refractory materials, electroplating and combustion has been polluted, and direct discharge will obviously affect people’s lives.) Chromium toxicity and the total presence of valence state related, hexavalent chromium is a clear harmful element, is a forced mutation of the substance, toxicity is 100 times higher than trivalent chromium toxicity, it can invade the human body through the digestive tract, respiratory tract, skin and other ways, in the body mainly accumulated in the liver, kidney and endocrine glands.
Among them, hexavalent chromium compounds can not be naturally degraded, will accumulate in the biological and human body for a long time, is a heavy pollution of the environment, long-term exposure to hexavalent chromium pregnant women may lead to infant stunting, although compared with hexavalent chromium trivalent chromium harm is really small, but excessive its toxicity has teratogen effect. Because the trivalent chromium discharged into the natural environment is likely to be converted into highly toxic hexavalent chromium, there are strict indicators for sewage pollution discharge control!
In order to ensure the safety of water quality! More and more water quality monitors are used to detect whether the indicators of the major parameters in the water are qualified, so what equipment is needed to detect the content of chromium in the water?
The T8000-Cr total chromium online analyzer produced by Moody Technology is colorimetric determination by acid oxidation and characteristic developing agent after masking interference ions. The pre-treated water sample is injected into the colorimetric tank by the injection pump, and then the masking agent is added to eliminate the influence of interfering substances. Then the pH of the solution is adjusted, and the characteristic color developer is added under the appropriate pH condition for color reaction. The color change of the solution within the measurement range is proportional to the concentration of hexvalent chromium in the water sample. You can calculate the amount of hexavalent chromium in the water sample. If the total chromium is measured, the oxidizer is added to the automatic line after pretreatment to oxidize the chromium of various valence states into hexavalent chromium, and then the colorimetric determination is carried out.
