ISO 2367:1972 天然和人造冰晶石.铝含量的测定.8-羟基喹啉重量法

标准编号：ISO 2367:1972

中文名称：天然和人造冰晶石.铝含量的测定.8-羟基喹啉重量法

英文名称：Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method

发布日期：1972-12

标准范围

如果Fe203含量不超过0.15，则可采用该方法。它也适用于NaF与AlF3摩尔比约为3至1,7的产品。其原理包括使用焦硫酸钾通过酸熔融溶解试验部分，并用盐酸回收。在醋酸还原介质中，用苯甲酸铵沉淀铝，分离混合物。在乙酸缓冲介质中溶解沉淀物并以三氧化二铝（喹啉-8-氧化物）的形式再沉淀。在130°C的温度下过滤、洗涤、干燥沉淀物并称重。

The method can be applied provided the Fe203 content does not exceed 0,15. It can also be applied to products with molar ratio of NaF to AlF3 between approximately 3 and 1,7. The principle consists in dissolution of a test portion by acid fusion using potassium pyrosulphate and recovery by hydrochloric acid. Separation of the mixture by precipitation of aluminium, with ammonium benzoate, in an acetic reducing medium. Dissolution of the precipitate and reprecipitation as aluminium tri(quinolin-8-oxide) in an acetic buffer medium. Filtration, washing, drying of the precipitate at a temperature of 130 °C and weighing.

标准预览图