标准摘要
[中文适用范围]： 本国际标准规定了通过冷冻干燥对土壤样品进行预处理以供后续分析的方法。 本标准适用于随后测定冷冻干燥条件下不挥发的元素或有机化合物的土壤样品。 一般来说，本国际标准也适用于污泥和沉积物样品。 该方法也适用于测定干物质（或水）含量的第一步，例如在样品含水量高的情况下。 [外文原描述]： ISO 16720:2005 specifies a method for pretreatment of soil samples by freeze-drying for subsequent analysis. ISO 16720:2005 is applicable to soil samples for subsequent determination of elements or organic compounds recognized as non-volatile under freeze-drying conditions. Generally, ISO 16720:2005 can also be applied to samples from sludges and sediments. This method is also applicable as a first step for the determination of dry matter (or water) content, for instance in the case of samples with high water content.
英文名称Soil quality — Pretreatment of samples by freeze-drying for subsequent analysis