At present, only GB / t22492-2008 soybean peptide powder, GB / t22729-2008 marine fish oligopeptide powder, QB / t4588-2013 freshwater fish protein peptide, QB / t4707-2014 corn oligopeptide powder and GB 31617-2014 national food safety standard food nutrition fortifier casein phosphopeptide are the only peptide standards in China. There are 3 national standards and 2 industry standards.

GB / t22492-2008 national standard of the people's Republic of China soybean peptide powder, as the first national standard for peptides in China, was officially implemented on January 1, 2009. In the standard, soybean peptide powder is clearly defined as "powder substance with relative molecular weight less than 5000 and mainly composed of peptide, which is produced by enzymatic hydrolysis or microbial fermentation with soybean meal or soybean protein as the main raw material."

It not only limits the raw materials and production process, but also defines the molecular weight of the product. In this standard, soybean peptide powder is also divided into three grades, and the physical and chemical indexes of three grade products are clearly defined from crude protein, peptide content, relative molecular weight of peptide segment, ash content, moisture, crude fat and urease activity, so as to strictly distinguish product quality, which is more conducive to the quality control of soybean peptide powder.

At the same time, high performance liquid chromatography (GPC) is used for the first time to determine the relative component distribution of peptides. The method is standardized in the form of national standard. Compared with traditional methods, this method has higher accuracy and repeatability, and has obvious advantages in operability and adaptability.

GB / t22729-2008 national standard of the people's Republic of China for marine and oligopeptide powder was implemented on August 1, 2009. Marine fish oligopeptide powder and collagen are clearly defined in the standard, and the products are divided into marine fish skin collagen oligopeptide powder, marine fish bone oligopeptide powder and marine fish meat oligopeptide powder.

According to the different characteristics of the three products, the physicochemical indexes were cut, and the content of total nitrogen and oligopeptide in collagen oligopeptide powder of marine fish skin was the highest. At the same time, the standard limits the pollutants such as inorganic arsenic, lead, cadmium, methyl mercury, etc., so as to improve the safety of the products.

Sb / T 10634-2011 domestic trade industry standard of the people's Republic of China, freshwater fish collagen peptide powder has been implemented since January 1, 2012. The standard not only defines freshwater fish collagen peptide powder, but also divides the product quality into three levels to refine product quality.

QB / T 4707-2014 the light industry standard of the people's Republic of China Corn oligopeptide powder has been implemented since November 1, 2014. The standard physical and chemical indexes not only include protein, polypeptide, molecular weight, moisture, ash and other common polypeptides, but also include the index of ay, the landmark peptide of corn peptide, which provides a reference for the identification of corn peptide and other peptide substances.

Since the development of peptide standards in 2008, the formulation and revision of the standards have been continuously improved. Not only the limit of pollutants has been added to improve the safety of products, but also the addition of landmark peptides also provides the basis for the identification of peptide categories. The detection methods are constantly updated and improved, from physical and chemical detection methods to high performance liquid chromatography.

The release and implementation of national and industrial standards for peptide substances not only standardize the quality of products, improve the safety of products, but also expand the application of products, to a certain extent, promote the healthy and orderly development of peptide industry. However, it is worth noting that there are a wide range of peptide products on the market, and the peptide products with national and industrial standards are rare.

The quality of more polypeptide products depends on the enterprise's own enterprise standards to control the product quality. The national standard of peptide substances in China lags behind the products seriously. The development of peptide industry is inseparable from the implementation of standards, and the national standards of peptide substances have a long way to go.