ISO 3391:1976 天然和人造冰晶石.钙含量的测定.火焰原子吸收法

标准编号：ISO 3391:1976

中文名称：天然和人造冰晶石.钙含量的测定.火焰原子吸收法

英文名称：Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method

发布日期：1976-09

标准范围

描述了校准图的制备，以及试验部分在浓硫酸中的溶解，并在热板上加热，直到氢氟酸蒸发。用浓盐酸处理残渣。将溶液吸入乙炔/一氧化二氮火焰中，并用分光光度法测量钙空心阴极灯发出的422.7-nm线的吸收。

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.

标准预览图