两种参考方法，方法A（技术上等同于ISO 1443）和方法B（英国惯例），均基于用盐酸分解试验部分以去除脂肪。方法A包括过滤和油炸分解物的中间步骤，然后进行索氏提取。方法B涉及液/液萃取。交叉引用:BS 770:第3部分BS 2071BS 2648BS 3978BS 4523BS 5348:第1部分

Two reference methods, Method A (technically equivalent to ISO 1443) and method B (usual UK practice), both based on the disintegration of the test portion with hydrochloric acid to free the fat. Method A involves the intermediate steps of filtration and frying of the disintegrated mass followed by soxhlet extraction. Method B involves liquid/liquid extraction.Cross References:BS 770:Part 3BS 2071BS 2648BS 3978BS 4523BS 5348:Part 1