Digestion method for measuring selenium in agricultural products and method for measuring selenium content in agricultural products

The invention belongs to the field of chemical detection and analysis, and relates to a digestion method for measuring selenium in agricultural products and a method for measuring the selenium content in the agricultural products. The digestion method provided by the invention comprises the following steps of: a) drying an agricultural product sample to be detected, crushing the agricultural product sample into powder, and continuously drying the agricultural product sample to constant weight to obtain dry powder; and b) mixing the dry powder with an acid solution, and then digesting the mixture in a boiling water bath to obtain a digestion solution. The acid solution is composed of HCl, HNO3 and water, the concentration of the HCl in the acid solution is 4 mol/L to 5 mol/L, and the concentration of the HNO3 in the acid solution is 1.7 mol/L to 2 mol/L. According to the method, the mixed solution of hydrochloric acid and nitric acid is used as a digestion reagent, the agricultural product dry powder sample is