GB/T 2 2427.8 - 2008 specifies the determination method of starch and its derivatives sulfated ash. The standard covers the collection and preparation process of samples, and specifies the required equipment, such as high temperature furnace, crucible, etc. Detailed specification of determination operations, including key links such as sulfuric acid treatment, burning temperature and time control, as well as results calculation and reporting methods. Sulfated ash content affects the mass and performance of starch and its derivatives. The standard provides a unified measurement basis for starch production, processing and related testing industries, helps to accurately control product mass, and promotes the standardization of testing work in the starch industry.