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建立了先用 4 0 1型螯合树脂分离饱和氯化钠溶液中Ca和Mg ,再用火焰原子吸收法测定Ca和Mg的方法。采用优化法研究了从基体预先分离Ca和Mg的操作条件。本法的相对标准偏差分别为 6 5 % (Ca)和 5 5 % (Mg) ,回收率分别为 99% (Ca)和 94 % (Mg)。
A method for separating Ca and Mg from saturated sodium chloride solution by using Chelating resin type 4 0 1 and measuring Ca and Mg by flame atomic absorption spectrometry was established. The optimization method was used to study the operating conditions for the pre-separation of Ca and Mg from the matrix. The relative standard deviations (RSDs) of this method were 65% (Ca) and 55% (Mg), respectively. The recoveries were 99% (Ca) and 94% (Mg), respectively.