ISO 10697-2-1994 钢 火焰原子吸收光谱法测定钙的含量 第2部分:总钙含量的测定

标准号：ISO 10697-2-1994
中文标准名称：钢 火焰原子吸收光谱法测定钙的含量 第2部分:总钙含量的测定
英文标准名称：Steel; determination of calcium content by flame atomic absorption spectrometry; part 2: determination of total calcium content
标准类型：H11
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：H11
国际标准分类号：6020;5980
适用范围：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).