In daily water quality testing, we found that heavy metals account for a considerable proportion of water pollution. We have also introduced to you that heavy metals are highly toxic, and they are very easy to accumulate and expand in the biological chain

In water quality testing, COD, BOD, TOC, TOD, etc. are commonly used indicators for the detection of organic compounds. Organic pollution in water generally refers to the deterioration of water quality caused by hydrocarbons and their derivatives. It can

In daily life, some light yellow scales appear on the inner wall of the kettle. Many people know that this is caused by the hardness of the water we drink. I have introduced you that the hardness of water is divided into two types, one is temporary hardne

The main function of ammonia nitrogen in water is to nourish plant growth. However, once the content of ammonia nitrogen in the water is too much, it will cause a large number of algae and microorganisms to grow, excessive consumption of dissolved oxygen

Redox titration is a commonly used analytical method in water quality testing. It can be divided into different methods according to the type of titrant used. Commonly used in daily water quality analysis are potassium permanganate titration, potassium di

Water hardness refers to the total amount of Mg2+ and Ca2+ concentrations in the water, and is one of the important indicators of water quality. Hardness can be divided into temporary hardness and permanent hardness: temporary hardness refers to the hardn

Heavy metal detection has always been a difficult problem in water quality determination, because there are often multiple metal ions in actual water samples, and interference will occur when one or more metal ions are to be detected. For example, when ED

There are relevant standards and methods for the residual chlorine detection of drinking water and environmental source water. Some of these methods require the use of buffer solutions, so that they can be offset or reduced during water quality testing. T

Residual chlorine generally refers to the residual chlorine ions in the water after chlorine disinfection. It is stipulated in the domestic drinking water standards that the free residual chlorine content of the centralized water supply factory water shou

Chromium is a silver-white shiny, hard and brittle metal. Because of its heat resistance, corrosion resistance and wear resistance, it is often used for chrome plating on other metal surfaces to make it durable. It is also used to make chrome steel and Ni