快速分析萤石中氟化钙、碳酸钙的探讨

Rapid Analysis of Calcium Fluoride and Calcium Carbonate in Fluorite

萤石的经典分析方法是将碳酸钙和氟化钙分离后,在用滴定法分别进行滴定分析,这种分析方法较为准确,但周期长、效率差、多次滴定易产生误差,无法满足快速大量测定样品的要求。本文探讨通过采用滴定-原子吸收法相结合方式测定萤石中氟化钙、碳酸钙的含量,可在大幅缩短测定时间的同时避免二次滴定产生的误差提升结果准确度,并可用于满足大量萤石样品的分析需求。

Titrimetry is one of the classical analysis methods of fluorspar. Calcium carbonate and calcium fluoride was separated from fluorspar, titrated them respectively. Despite the advantage of it is accuracy, but the long period, poor efficiency and repeatedly titrated of it were unable to match the requirements of large number of samples measurement. In this paper, a new method was proposed, which is combining both titration and atomic absorption spectrometry. By this way, we can quickly and exactly detect contains of those two calcium salts in large scale analysis, at the same time, it avoids the random errors causing by the second titration, and improves the accuracy and can be used to meet the demand of a large number of fluorite sample analysis.