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目前常用的铜的光度测定法,摩尔吸光系数一般在10~3—10~4量级,分析某些物料时不能满足要求。因此,需要进一步探索高灵敏度的分析方法,以适应微量分析工作的要求。本文研究了Cu(Ⅱ)-CAS-CTMAB三元络合物的显色条件,并利用新亚铜灵萃取分离干扰元素,拟定了黄铁矿中微量铜的测定方法。本法具有较高的灵敏度,表观摩尔吸光系数达1.11×10~5。可测定黄铁矿中0.00x—0.x%的铜。
Currently used copper photometric method, the molar absorption coefficient is generally in the 10 ~ 3-10 ~ 4 order of magnitude, the analysis of certain materials can not meet the requirements. Therefore, there is a need to further explore highly sensitive analytical methods to meet the requirements of microanalysis. In this paper, the conditions for the color development of Cu (Ⅱ) -CAS-CTMAB ternary complex were studied. The new copper (Cu) was used to extract and separate the interference elements and the determination method of trace copper in pyrite was developed. This method has high sensitivity, the apparent molar absorption coefficient of 1.11 × 10 ~ 5. 0.00x-0.x% copper in pyrite can be determined.