Phosphorus is widely found in animal and plant tissues, and it is also one of the elements with more content in human body, accounting for about 1% of human body weight. The adult body contains about 600-900g of phosphorus. 85.7% of phosphorus in the body is concentrated in bone and teeth, and the rest is scattered in various tissues and body fluids, half of which is in muscle tissue. It not only constitutes human body components, but also participates in very important metabolic processes in life activities, and is a very important element of the body.

Therefore, it is necessary to determine the content of phosphate in food. Ion chromatography has the advantages of rapid and accurate determination of different phosphates.