ISO 2069:1976 主要用于制铝的氧化铝.钙含量的测定.火焰原子吸收法

标准编号：ISO 2069:1976

中文名称：主要用于制铝的氧化铝.钙含量的测定.火焰原子吸收法

英文名称：Aluminium oxide primarily used for the production of aluminium — Determination of calcium content — Flame atomic absorption method

发布日期：1976-08

标准范围

本方法适用于钙含量大于0003%（m/m）的产品。其原理是在压力下受盐酸的影响溶解试验部分。添加钠离子以促进和稳定钙的排放，添加镧离子或三乙醇胺以增加灵敏度。将溶液吸入乙炔-一氧化二氮火焰中，并用光度法测量空心阴极钙灯发出的422,7 nm吸收线。用于测定较高CaO含量（超过约0.03%（m/m））的乙炔-可以使用空气火焰。取代ISO建议R 2069-1971。

This method is applicable to products having Ca contents greater than 0,003 % (m/m). The principle consists in dissolution of a test portion by the influence of hydrochloric acid under pressure. Addition of sodium ions to promote and to stabilize the emission of calcium, and of lanthanum ions or triethanolamine to increase the sensitivity. Aspiration of the solution into an acetylene-dinitrogen monoxide flame and photometric measurement of the absorption of the 422,7 nm line emitted by a hollow-cathode calcium lamp. For the determination of higher CaO contents (over about 0,03 % (m/m)) an acetylene-air flame can be used. Replaces ISO Recommendation R 2069-1971.

标准预览图