标准摘要
[中文适用范围]： 适用于F含量大于0.003%（m/m）的产品。 测试部分在压力下受到硫酸的侵蚀而溶解。 在（150±1）的温度下用硫酸蒸馏分离氟。 蒸馏按照 ISO 1693 中描述的方法进行。 在 4.5 至 4.6 之间的 pH 值下，氟和茜素络合酮/氯化镧试剂之间形成蓝色络合物。 添加丙酮以增加氟配合物的稳定性和灵敏度。 在约 620 nm 波长下对复合物进行分光光度测量。 也得到了 IUPAC 的批准。 [外文原描述]： Applicable to products having F contents of more than 0.003 % (m/m). Dissolution of a test portion by attack by sulphuric acid under pressure. Separation of the fluorine by distillation at a temperature of (150 1) °C by sulphuric acid. The distillation is carried out by the method described in ISO 1693. Formation of a blue coloured complex between fluorine and alizarin complexone/lanthanum chloride reagent at a pH between 4.5 and 4.6. Addition of acetone to increase the stability and sensitivity of the fluorine complex. Spectrophotometric measurement of the complex at a wavelength of about 620 nm. Has also been approved by the IUPAC.
英文名称Aluminium oxide primarily used for the production of aluminium — Determination of fluorine content — Alizarin complexone and lanthanum chloride spectrophotometric method