标准摘要
[中文适用范围]： 该方法适用于 NaF/AlF3 摩尔比等于约 3 的产品的替代方法。 火焰发射法的原理在于测试溶液在氧/氢火焰中雾化，并通过测量强度进行测定589 nm 处的辐射。 火焰原子吸收法的原理是基于空气/乙炔火焰中的雾化和钠空心阴极灯发射的 589 nm 线的吸收测量。 测试溶液的制备是通过将测试部分在浓硫酸侵蚀后溶解在盐酸和水中来进行的。 [外文原描述]： The methods are applicable as alternatives to products for which the molar ratio NaF/AlF3 is equal to about 3. The principle of the flame emission method consists in atomization of the test solution in a flame of oxygen/hydrogen and determination by measurement of the intensity of the radiation at 589 nm. The principle of the flame atomic absorption method is based on atomization in an air/acetylene flame and measuremnt of the absorption of the 589 nm line emitted by a sodium hollow-cathode lamp. The preparation of the test solution is carried out by dissolution of a test portion in hydrochloric acid and water after attack by concentreted sulphuric acid.
英文名称Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods