The principle of phenol to detect the concentration of ammonia in water is very simple. Under the coexistence of hypochlorite ions, ammonia and phenol will react into a dark blue compound-indophenol blue. We only need to measure its absorbance to get the

Hardness is one of the basic parameters of water, and we cannot completely remove it in practical applications. Water of different hardness will have a certain impact when used. For example, if the hardness of domestic drinking water is too high, it will

I have introduced you to the detection steps of soluble silicon in water before, but there are some things you need to pay attention to when performing related operations, otherwise it will easily cause some unnecessary troubles. Today we will summarize f

Calcium ion is a common inorganic salt in water, and it and magnesium ion are also important components of water hardness. For example, the white precipitate formed when water is boiled is actually caused by calcium and magnesium ions in the water. Theref

There are many substances in natural water bodies. Among them, inorganic silicon is one of the relatively complex inorganic substances. It exists in the form of colloidal silicon and dissolved silicon, and various forms of silicon can be transformed into

Under acidic conditions, the polyphosphate in the water will gradually hydrolyze to orthophosphate during the boiling process, and can form a phosphomolybdenum antimony complex with ammonium molybdate. After ascorbic acid is used to reduce to phosphomolyb

1. Nitrate sample pretreatmentWhen the water sample contains organic matter and the nitrate content is high, it needs to be pre-treated and then diluted.Method: Add 4mL of aluminum hydroxide suspension to 100mL of water sample, shake for 3min, stand for c

Nitrate is a common nitrogen compound, and it is also very common in nature. Nitrate substances are easily soluble in water, so they also contain some in water. Under normal circumstances, the nitrate content in the water is very low, and the impact on th

Today I will tell you about the detection method of sulfate in water. I need to remind you that the method introduced today is suitable for the detection of sulfate ions in water with a content of less than 10mg/L. It is not suitable for the detection of

Volatile phenol in water refers to the protoplast poison with boiling point below 230, which can be divided into volatile and non volatile, which has great harm to crops, fish and human body. The pollution source is mainly from industrial wastewater of ch