Simultaneous Determination of Lead and Cadmium in Urine by Oscilloscopic Polarography
摘 要
研究示波极谱法同时测定尿中铅和镉的方法.运用正交试验选择底液的组成为碘化钾-抗坏血酸-浓盐酸-磷酸.用硝酸、高氯酸、盐酸混合酸消化尿样,消化液在酸性介质中,置极谱仪的三电极系统,样品溶液在滴汞电极上产生还原电流,分别于-480 mV和-620 mV处测量铅和镉的峰电流,对尿样中铅和镉进行测定,铅、镉的质量浓度在100 μg·L-1以内与峰电流呈线性关系.铅、镉的相对标准偏差分别为 6.91%,6.45%,检出限(3S/N)分别为2.0,1.0 μg·L-1,回收率分别为88.4%~101.4%,83.1%~103.5%.
Abstract
An oscilloscopic polarography method for simultaneous determination of Pb(Ⅱ) and Cd(Ⅱ) in urine was studied in this paper.The optimal composition of the supporting electrolytes was selected with orthogonal trial.Under conditions of the optimal composition of supporting electrolytes of potassium iodide-ascorbic acid-hydrochloric acid-phosphoric acid,Pb(Ⅱ) and Cd(Ⅱ) were determined and the linear relationship between peak current and concentration was observed in range of 100 μg·L-1 for both Pb(Ⅱ) and Cd(Ⅱ).RSD′s of the determination were 6.91% for Pb(Ⅱ) and 6.45% for Cd(Ⅱ).DL (3S/N) was 2.0 μg·L-1 for Pb(Ⅱ) and 1.0 μg·L-1 for Cd(Ⅱ).Recovery was in range of 88.4%-101.4% for Pb(Ⅱ) and 83.1%-103.5% for Cd(Ⅱ).
中图分类号 O657.14
所属栏目 工作简报
基金项目
收稿日期 2007/6/22
修改稿日期
网络出版日期
作者单位点击查看
备注肖虹(1970-),女,重庆人,副教授,主要研究方向为环境污染与卫生检验.
引用该论文: XIAO Hong,ZHANG Xiao-li,XIE Yi-ling,ZHOU San-jin,CHEN Xue-mei. Simultaneous Determination of Lead and Cadmium in Urine by Oscilloscopic Polarography[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(12): 1225~1226
肖虹,张晓丽,谢宜羚,周三景,陈雪梅. 示波极谱法同时测定尿中铅和镉[J]. 理化检验-化学分册, 2008, 44(12): 1225~1226
被引情况:
【1】陈文宾,殷磊,斯琴高娃,马卫兴,许兴友, "1-(4-安替比林)-3-(3-硝基苯胺)三氮烯分光光度法测定镉(Ⅱ)",理化检验-化学分册 47, 1043-1045(2011)
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】GB/T 5009.12-2003食品中铅的测定[S].
【2】鲁长豪.生物材料检验[M].成都:四川科学技术出版社,1990.
【3】孙成均.生物材料检验[M].北京:人民卫生出版社,2006.
【4】王锋.示波极谱法测定饮料中铅和镉[J].理化检验-化学分册,2005,41(3):204-205.
【5】常兆光,王清河.宋岱才,等.随机数据处理方法[M].山东:石油大学出版社,1997.
【2】鲁长豪.生物材料检验[M].成都:四川科学技术出版社,1990.
【3】孙成均.生物材料检验[M].北京:人民卫生出版社,2006.
【4】王锋.示波极谱法测定饮料中铅和镉[J].理化检验-化学分册,2005,41(3):204-205.
【5】常兆光,王清河.宋岱才,等.随机数据处理方法[M].山东:石油大学出版社,1997.
相关信息