How to test the acidity and alkalinity of water

In life, water is a substance we use frequently. Not only does it need water for eating and cooking, but the human body also needs to replenish water at any time and wash clothes. Therefore, the acidity and alkalinity of water are particularly important, especially for the drinking water we drink. If the acidity and alkalinity do not meet the standards, it will cause great harm to our body. So how do we test the acidity and alkalinity of water? Let me introduce it to you below.

Method for testing the acidity and alkalinity of mineral water

You can use pH test paper to test, just drop a drop and compare it with the standard colorimetric card to know the acidity and alkalinity.

Determination of alkalinity of water

The alkalinity in water refers to the amount of substances in the water that can accept hydrogen ions. In fact, the sources are varied. For example, hydroxide, carbonate, bicarbonate, phosphate, silicate, sulfite and nitrogen are all common alkaline substances in water, and they can all react with acid. Alkalinity is a comprehensive characteristic indicator of water, representing the sum of substances that can be titrated by strong acid. Alkalinity index is often used to evaluate the buffering capacity of water bodies and the solubility and toxicity of metals in them: it is a judgment indicator for controlling water and wastewater treatment processes. If the alkalinity is caused by excess metal salts, then the alkalinity is an important basis for determining whether the water is suitable for irrigation.

Equivalent to the standard method acid-base indicator titration (Water and Wastewater Monitoring and Analysis Methods (4th Edition). The water sample is titrated with a standard acid solution to a specified pH value, and the key point can be determined by the color change of the added acid-base indicator at the pH value.

Users do not need special training and can independently complete the analysis and test of water alkalinity by following the instructions. The test of a water sample can be completed in 5 minutes. The test results are the same as those in international standards and can be used as an alternative to the national standard.

Detailed explanation of the pH value of mineral water

Water is the basis and source of life. The pH value of body fluids is directly related to the pH value of drinking water, and a large part of the water in the human body comes from direct drinking water. So what are the "little secrets" about the relationship between drinking mineral water and the pH value of body fluids?

The best pH value for drinking water is 6.5-8.5

According to the "Sanitary Standards for Drinking Water", the pH value of drinking water should be between 6.5-8.5 and should be marked on the bottle; the range applies to purified water, mineral water, etc. So what harm will it do to the body if it is lower or higher than this standard? Drinking water experts said that the pH value of the human body is usually 7.35-7.45, which refers to the pH value of human blood, and cannot be understood as the pH value of the human body. In fact, the pH value of various parts of the human body is different.