| 二次微分电位溶出法测定食品中镉、锌含量 |
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| 引用本文： | 章建军,李向力,王燕,王永.二次微分电位溶出法测定食品中镉、锌含量[J].河南科学,2007,25(6):915-917. |
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| 作者姓名： | 章建军 李向力 王燕 王永 |
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| 作者单位： | 河南省食品质量安全控制工程技术,研究中心,郑州,450002 |
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| 摘 要： | 建立了二次微分电位溶出法测定食品中镉、锌含量的方法.优化了试验条件如pH值、电沉积电位、平衡电位等,线性范围:镉0～16 ng,锌0～800 ng;检出限分别为0.24 ng/mL、0.71 ng/mL,RSD<2.5%(n=7).该法测定食品样品结果与石墨炉原子吸收法一致.
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| 关 键 词： | 二次微分电位溶出法 食品 镉 锌 |
| 文章编号： | 1004-3918（2007）06-0915-03 |
| 修稿时间： | 2007-07-19 |
Method for Determination of Cd and Zn in Food by Quadratic Differential Potentiometric Stripping |
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| ZHANG Jian-jun,LI Xiang-li,WANG Yan,WANG Yong.Method for Determination of Cd and Zn in Food by Quadratic Differential Potentiometric Stripping[J].Henan Science,2007,25(6):915-917. |
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| Authors: | ZHANG Jian-jun LI Xiang-li WANG Yan WANG Yong |
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| Institution: | The Engineering Research Center of Food Quality and Safety Control of Henan Province, Zhengzhou 450002, China |
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| Abstract: | A method for determination of trace amounts of Cd and Zn in food by quadratic differential potentiom-etric stripping.The experimental parameter,such as pH values,accumulation potential and equilibrium potential were optimized.The peak currents were linear with the concentration in the range:0～16 ng for Cd2+,0～800 ng for Zn2+;The detection limits were 0.24,0.71 ng / mL;RSD<2.5 %(n=7).Consistent results of in food were obtained by this method as compared with GF-AAS method. |
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| Keywords: | quadratic differential potentiometric stripping food Cd Zn |
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