计算分析方法中使用的干质量时，可能需要进行该测定。仅适用于含水量不超过10%的产品。其原理是在105°C温度下，在恒温烘箱中干燥试样，然后称重。水分含量根据试验部分的质量损失计算。取消并替换ISO 585:1982第一版，该版本为次要修订版。

This determination may be required for the calculation of the dry mass used in analytical methods. Applies only to products with a moisture content of not more than 10 %. The principle consists in drying a test portion at 105 ° centigrade in a thermostatic oven, then weighing. The moisture content is calculated from the loss of mass of the test portion. Cancels and replaces the first edition ISO 585:1982, of which it constitutes a minor revision.