Hexavalent chromium is present in the form of oxy-containing acids, mainly orange Cr2O72- in acidic solutions and yellow CrO42- in alkaline solutions. So is it harmful to the human body? Is it okay not to test the water for hexavalent chromium?

About Hexavalent Chromium Brought Harm!

Hexavalent chromium is an ingestible poison/an inhalable extreme poison, and skin contact may cause sensitivity; It is likely to cause inherited genetic defects that pose a lasting risk to the environment. But these are properties of hexavalent chromium, chromium metal, trivalent or tetravalent chromium does not have these toxicity.

Hexavalent chromium is easily absorbed by the body and can invade the body through digestion, respiratory tract, skin and mucous membranes. It has been reported that breathing air containing different concentrations of chromic anhydride has different degrees of hoarseness, nasal mucosa atrophy, and can also make nasal septum perforation and bronchiectasis in serious cases. Through the digestive tract invasion can cause vomiting, abdominal pain. It can cause dermatitis and eczema when it penetrates the skin. What is more serious is the risk of death from long or short term exposure or inhalation.

In excess (more than 10ppm) hexavalent chromium is lethal to aquatic organisms. Experiments show that hexavalent chromium in contaminated drinking water can cause cancer. Hexavalent chromium compounds are commonly used in animals such as electroplating and tannery. After drinking water containing hexavalent chromium, hexavalent chromium will be absorbed by cells in many tissues and organs in the body.

Chromium Hexavalent in Water is So Terrible that you Don’t Need to Test It?

The T8000-Cr hexavalent chromium online analyzer produced by Modi-Tech uses acid oxidation, after masking interference ions characteristic developing agent colorimetric determination. 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.

If you need to know more about the water quality monitor, please pay attention to Hangzhou Modi-Tech!