标准摘要
[中文适用范围]： 该方法的原理是将供试品溶解在盐酸和硝酸中，将不溶于酸的残留物与碳酸钠熔融，加入氯化钾/硝酸镧溶液作为光谱化学缓冲剂，将溶液喷入一氧化二氮-乙炔火焰中，并用光谱法测量钙空心阴极灯发出的 422.7 nm 光谱线的原子吸收。 该方法适用于钙含量在 0.0005% (m/m) 至 0.005% (m/m) 之间。 [外文原描述]： The principle of the method specified is dissolving a test portion in hydrochloric and nitric acids, fusing the acid-insoluble residue with sodium carbonate, adding potassium chloride/lanthanum nitrate solution as a spectrochemical buffer, spraying the solution into a dinitrogen monoxide-acetylen flame, and spectrometrically measuring the atomic absorption of the 422,7 nm spectral line emitted by a calcium hollow cathode lamp. The method is applicable to calcium contents betwen 0,0005 % (m/m) and 0,005 % (m/m).
英文名称Steel — Determination of calcium content by flame atomic absorption spectrometry — Part 2: Determination of total calcium content