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

标准号：ISO 2367-1972
中文标准名称：天然和人造冰晶石 铝含量的测定 8-羟基喹啉重量法
英文标准名称：Cryolite (natural and artificial); Determination of aluminium content; 8- Hydroxyquinoline gravimetric method
标准类型：D59
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：D59
国际标准分类号：73.060.40
适用范围：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 鳦 and weighing.