ISO 3391-1976 天然和人造冰晶石 钙含量的测定 火焰原子吸收法

标准号：ISO 3391-1976
中文标准名称：天然和人造冰晶石 钙含量的测定 火焰原子吸收法
英文标准名称：Cryolite, natural and artificial; Determination of calcium content; Flame atomic absorption 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：Describes the preparation of the calibration graph and the dissolution of a test portion in concentrated sulphuric acid and heating on a hot-plate until the hydrofluoric acid has evaporated. Treatment of the residue with concentrated hydrochloric acid. Aspiration of the solution into an acetylene/dinitrogen monoxide flame and spectrophotometric measurement of the absorption of the 422.7-nm line emitted by a calcium hollow cathode lamp.