| 单扫描极谱反扫法同时测定微量铅和镉 |
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| 引用本文： | 邱红心,唐平,秦汉明.单扫描极谱反扫法同时测定微量铅和镉[J].江汉大学学报(自然科学版),2007,35(2):41-43. |
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| 作者姓名： | 邱红心 唐平 秦汉明 |
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| 作者单位： | 江汉大学,化学与环境工程学院,武汉,430056 |
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| 基金项目： | 湖北省教育厅资助项目(2003X041) |
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| 摘 要： | 铅、镉在HCl体系中可在滴汞电极上产生良好的可逆极谱波,其反扫溶出二阶导数波峰电位分别为0.43 V(vs.SCE)和0.63 V(vs.SCE).峰电流I“Pb和I”Cd分别与PbⅡ、CdⅡ的浓度在0.002～200 g/mL和0.001～100 g/mL范围内成良好的线性关系.线性回归方程分别为I“Pb=142.3+160.7 CPb和I”Cd=84.3+255.1 CCd;相关系数分别为0.9998和0.9997;检出限分别为0.0006 g/mL和0.0003 g/mL.用此方法测定了蔬菜、水样和酒样中的微量铅、镉.试样加标回收率分别为101%～105%和97%～104%,该方法具有重现性好、简便、快速、灵敏度高等特点.
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| 关 键 词： | 铅 镉 测定 单扫描极谱 反扫法 |
| 文章编号： | 1673-0143（2007）02-0041-03 |
| 修稿时间： | 2007-01-09 |
Simultaneous Determination of Trace Lead and Cadmium by Single Scanning Opposite Polarography |
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| QIU Honq-xin,TANG Ping,QIN Han-ming.Simultaneous Determination of Trace Lead and Cadmium by Single Scanning Opposite Polarography[J].Journal of Jianghan University:Natural Sciences,2007,35(2):41-43. |
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| Authors: | QIU Honq-xin TANG Ping QIN Han-ming |
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| Institution: | School of Chernistry and Environmental Engineering, Jianghan University, Wuhan 430056, China |
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| Abstract: | The sensitive polarographic adsorptive wave of Lead(Ⅱ) and Cadmium(Ⅱ) in HCl system was studied.The peak potential(EP") of opposite scanning is 0.43V(vs.SCE) and 0.63 V.The change of peak current(IP") with the concentration of Lead(Ⅱ) and Cadmium(Ⅱ) is linear in the range of 0.002 ~ 200 g /mL and 0.001 ~ 100 g/mL,Pb= 0.9998 and Cd=0.9997,and the detection limit is 0.0006 g/mL and 0.0003 g/mL.Trace Lead(Ⅱ) and Cadmium(Ⅱ) in vegetable and drinks was determined by this method.The recovery was 101%~105%,97% ~ 104%.This method is accurate,simple,rapid,and good reproducibility |
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| Keywords: | Lead Cadmium determination single scanning opposite polarography |
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