不同二苯碳酰二肼分光光度法测定水中铬(Ⅵ)的方法比较

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英文篇名：Comparison of Spectrophotometric Determination of Chromium(Ⅵ) in Water with Different Diphenylcarbazide 作者：代阿芳 ; 范慧 ; 黄依凡 英文作者：DAI A-fang;FAN Hui;HUANG Yi-fan;Anhui Institute of Geological Experiment (Hefei Mineral Resources Supervision and Detection Center,Ministry of Land and Resources); 关键词：二苯碳酰二肼分光光度法 ; 水 ; 铬(Ⅵ) ; 显色剂 英文关键词：diphenylcarbazide spectrophotometry;;water;;chromium(Ⅵ);;chromogenic agent 中文刊名：世界有色金属 英文刊名：World Nonferrous Metals 机构：安徽省地质实验研究所(国土资源部合肥矿产资源监督检测中心); 出版日期：2019-09-09 16:58 出版单位：世界有色金属 年：2019 期：14 语种：中文; 页：160-161 页数：2 CN：11-2472/TF ISSN：1002-5065 分类号：X832

摘要

采用乙醇溶液代替丙酮做为二苯碳酰二肼分光光度法测定水中铬(Ⅵ)的显色剂的溶剂,改进了GB/T5750-2006的方法,实验得知此方法和DZ/T 0064.17-93标准工作曲线线性良好。将两种方法应用于两种体系水中铬(Ⅵ)的测定,加标回收率达92%以上,均能满足准确度要求,由此可考虑简化测定铬(Ⅵ)的一般水样的保存方法,对以后测定水中铬(Ⅵ)的工作具有指导意义。
        Ethanol solution was used instead of acetone as the solvent for the spectrophotometric determination of chromium(Ⅵ) in water by diphenylcarbazide. The method of GB/T5750-2006 was improved. The experimental results show that this method and DZ/T 0064.17-93 standard working curve have good linearity. The two methods are applied to the determination of chromium(Ⅵ) in water of two systems. The recovery rate of standard addition is over 92%, which can meet the accuracy requirement. Therefore, a simplified method for the preservation of general water samples for the determination of chromium(Ⅵ) can be considered, which has guiding significance for the future determination of chromium(Ⅵ) in water.

引文

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