CNS 3502-1972 - 中外标准 - - 1972/10 - 现行
ISO 2096-1972 - 中外标准 - - 1972/6 - 现行
The procedures are applicable to crude or refined products in the course of filling, or to products already contained in drums or in transportable or fixed tanks. Owing to the heterogeneity of the lots it is recommended to adopt the sampling during filling. Specifies particular precautions in view of the very hygroscopic nature of the product. The principle consists in samplings, at regular intervals, of equal quantities throughout filling. Mixing of these successive samples, homogenization and then taking the laboratory samples.
ISO 2197-1972 - 中外标准 - - 1972/6 - 现行
碳酸钠抽样方法化学制品化学分析和试验抽样化学分析samplingchemical analysischemicalssodium carbonatesodium carbonatessampling methodschemical analysis and testing