ISO 18400-201:2017规定了采样后可直接“现场”应用的样品预处理方法。本文件中的预处理方法仅限于: -旨在减少样本大小/体积的样本划分方法； -复合样品的生产； -选择取样材料的特定部分。 ISO 18400-201:2017 -不适用于生物或微生物检验所需的样品， -不适用于挥发性成分含量取样的土壤材料，以及 注1:这些土壤材料拟根据ISO 22155进行取样。 -? 不提供粒径减小的说明。 注2:ISO 11464、ISO 14507和ISO 23909中给出了粒度减小指南。

ISO 18400-201:2017 specifies methods for the pretreatment of samples that can be applied "in the field" directly after sampling. Pretreatment methods in this document are limited to: - sample division methods aimed at reducing the size/volume of the sample; - the production of composite samples; - the selection of a specific fraction of the sampled material. ISO 18400-201:2017 - does not apply to samples required for biological or microbiological examination, - does not apply to soil materials sampled for the content of volatile components, and NOTE 1 These soil materials are intended to be sampled according to ISO 22155. -? does not give instructions for particle size reduction. NOTE 2 Guidance for particle size reduction is given in ISO 11464, ISO 14507 and ISO 23909.