标准摘要
[中文适用范围]： 适用于五氧化二磷含量为0.005%（m/m）至0.05%（m/m）的产品。 根据 ISO 5444 测定质量损失所得的残留物用于制备测试样品。 溶于稀盐酸和硝酸溶液。 黄色钼钒酸盐的形成和在约 420 nm 波长下的分光光度测量。 根据测得的吸光度计算含量。 [外文原描述]： Applicable to products having contents, expressed as phosphorus pentoxide, of 0.005 % (m/m) to 0.05 % (m/m). The residue from the determination of the loss of mass according to ISO 5444 is used to prepare the test sample. Dissolution in dilute hydrochloric acid and nitric acid solutions. Formation of the yellow molybdovanadate and spectrophotometric measurement at a wavelength of about 420 nm. Calculation of the content from the measured absorbance.
英文名称Sodium hexafluorosilicate for industrial use — Determination of phosphate content — Molybdovanadate spectrophotometric method