规定方法的原理是在干净的铂盆中加热称重的均质样品，通过燃烧去除可燃材料，最后通过加热去除碳，将残渣与四硼酸二锂/氟化锂熔剂熔融，在酒石酸和盐酸溶液中消化熔融混合物，用水稀释至一定体积，通过ICPES或AAS测量溶液。该方法适用于铝的浓度在5 mg/kg至150 mg/kg之间，硅的浓度在10 mg/kg至250 mg/kg之间。

The principle of the method specified is heating a weighed quantity of homogenized sample in a clean platinum basin, removing the combustible material by burning, finally removing the carbon by heating, fusing the residue with a dilithium tetraborate/lithium fluoride flux, digesting the fused mixture in a solution of tartaric acid and hydrochloric acid, dilution to volume with water, measuring the solution by ICPES or AAS. The method is applicable for concentrations between 5 mg/kg and 150 mg/kg for aluminium and 10 mg/kg and 250 mg/kg for silicon.