从要取样的批次中取一定数量的增量。根据取样目的，将增量混合形成一个散装样品或几个初级样品。通过重复还原，从散装样品或每个初级样品中制备一个还原样品，然后从几个实验室样品中制备一个还原样品，在每种情况下，在每个分离阶段之前进行混合，如有必要，对产品进行研磨和筛分。本国际标准适用于最大粒径为100 mm的产品。

From the lot to be sampled a certain number of increments is taken. The increments are mixed to form either a bulk sample or several primary samples, depending on the purposes of the sampling. By means of replicate reductions a reduced sample is prepared from the bulk sample or from each primary sample, then several laboratory samples, each stage of the division being preceded in each case by blending and, if necessary, by grinding and sieving the product. This International Standard is applicable to products with a maximum particle size of 100 mm.