紫外可见分光光度法测定水中六价铬的线性范围  

Linear range for determination of hexavalent chromiu in water by UV-Vis spectrophotometry

作　　者：张伟 刘建刚[1] 张斌龙 王美霞 计顺顺 ZHANG Wei;LIU Jiangang;ZHANG Binlong;WANG Meixia;JI Shunshun(School of Earth Sciences and Engineering,Hohai University,Nanjing 211106,China;Nanjing Research Institute of Surveying,Mapping & Geotechnical Investigation,Co.,Ltd.,Nanjing 210019,China)

机构地区：[1]河海大学地球科学与工程学院,南京211106 [2]南京市测绘勘察研究院股份有限公司,南京210019

出　　处：《化学分析计量》2019年第1期9-12,共4页Chemical Analysis And Meterage

基　　金：国家自然科学基金项目(No.41272265)

摘　　要：探讨紫外可见分光光度法测定水中六价铬的最佳线性范围。GB 7467–1987规定以二苯碳酰二肼为显色剂,用紫外可见分光光度法测定水中的六价铬,实践表明,在标准规定的浓度区间内,测量精密度和准确度不能达到标准要求。大量的实验数据表明此法测定水中六价铬的最佳线性范围为0.05～0.4μg/mL。The optimum range of the concentration for determining hexavalent chromium in water by UV-Vis spectrophotometry was discussed.UV-Vis spectrometry was used with diphenylcarbazide as the chromogenic agent in GB7476-1987 to determine hexavalent chromium in water,and in the range of hexavalent chromium concentration,the detection precision and accuracy did not meet the demand of the standard.By analysizing a lardge amount of test datas,it showed that the optimal linear range for the determination of hexavalent chromium in water by this method was 0.05-0.4μg/mL.

关 键 词：二苯碳酰二肼 紫外可见分光光度法 六价铬 线性范围 

分 类 号：O657.3[理学—分析化学]