Method for desorbing isoprothiolane in rice protein through hydrogen peroxide and ethyl alcohol under neutrality condition

The invention discloses a method for desorbing isoprothiolane in rice protein through hydrogen peroxide and ethyl alcohol under a neutrality condition. The method comprises the following steps that firstly, treatment through hydrogen peroxide is carried out, wherein the rice protein with the isoprothiolane exceeding the standard and hydrogen peroxide with the mass concentration of 0.5-5% are mixed according to the weight ratio of 1:4-7, the pH is regulated to be 6.5-7.5, stirring treatment is carried out for 1-2 h, filtering is carried out, and filtering residues are obtained; secondly, treatment through ethyl alcohol is carried out, wherein the filtering residues obtained in the first step and an ethyl alcohol solution with the mass concentration higher than 60% are mixed according to the mass ratio of 1:4-7, stirring treatment is carried out for 1.5-2 h at the temperature of 35 DEG C-75 DEG C, filtering is carried out until the moisture is lower than 55%, and filtering residues are obtained; thirdly, post-treatment is carried out, wherein the filtering residues obtained in the second step are washed with water, dried and sterilized, the sterilized materials are smashed, and the rice protein with the isoprothiolane content lower than 10 ppb is obtained. By means of the method, the isoprothiolane desorbing rate can reach higher than 90%, the technology is simple, operation is convenient, and the method is suitable for mass production.