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原子吸收分光光度法测定矿物原料中的钙、镁,特别是低量钙、镁,是比较理想的方法,试样经氢氟酸——高氯酸或盐酸——硝酸分解后,添加释放剂消电离剂和络合剂,并稀释至一定体积,最后将此溶液喷入空气——乙炔火焰测定消光值。与EDTA容量法比较,本法具有简单、快速、不需预先分离等一系列优点。样品的分解一般采用盐酸、硝酸、氢氟酸和高氯酸等无机酸。据资料报导,阴离子降低钙(对镁影响小)的吸收强度的能力按以下顺号递减。
Atomic absorption spectrophotometry for the determination of calcium and magnesium in mineral raw materials, especially low calcium and magnesium, is an ideal method. After the sample is decomposed by hydrofluoric acid-perchloric acid or hydrochloric acid-nitric acid, the release agent Deionization agent and complexing agent, and diluted to a certain volume, and finally the solution is injected into the air - acetylene flame extinction value. Compared with the EDTA volumetric method, this method is simple, fast, without prior separation and a series of advantages. The decomposition of the sample generally used hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid and other inorganic acids. According to statistics, the ability of anions to reduce the absorption intensity of calcium (which has a small effect on magnesium) is decremented by the following number.