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纯希土元素中钙的测定,我厂过去一直沿用NH_3-六次甲基四胺水解沉淀分离希土,EDTA络合滴定法测定,方法灵敏度低,误差大。用钙试剂显色、正丁醇萃取比色钙,虽然灵敏度高,但流程长,分析手续烦琐。我们利用蔡司单色仪安装原子吸收分光光度计,用于希土中杂质元素的测定,对于一些易测元素如钙、镁等,由于操作简单快速,适用于大量样品分析。
The determination of calcium in pure earthen elements, our factory in the past has been used NH_3 - hexamethylenetetramine hydrolytic precipitation separation of rare earth, EDTA complexometric titration, the method of low sensitivity, error. Color reagent with calcium, n-butanol colorimetric calcium extraction, although the high sensitivity, but the process is long, analytical procedures cumbersome. We use the Zeiss monochromator to install atomic absorption spectrophotometer for the determination of impurity elements in the earth. For some easy-to-measure elements such as calcium, magnesium, etc., it is suitable for a large number of sample analysis because of its simple and quick operation.