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.
作者
张伟
刘建刚
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)
出处
《化学分析计量》
CAS
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)
