| 铋膜电极溶出伏安法测定苍耳子中锌的含量 |
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| 引用本文： | 马政,郭子英.铋膜电极溶出伏安法测定苍耳子中锌的含量[J].光谱实验室,2009,26(1):5-8. |
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| 作者姓名： | 马政 郭子英 |
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| 作者单位： | 1. 大同市科技发展战略研究所,山西省大同市新建南路277号,037008
2. 山西大同大学化学与化工学院,山西省大同市,037009 |
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| 摘 要： | 采用电位溶出法,用铋膜电极替代汞膜电极对中药苍耳子中微量元素锌的测定作了研究,考察了同位镀铋膜及测定微量元素锌的条件。实验结果表明：锌在以KSCN为支持电解质的铋膜电极上可得到灵敏的电位溶出峰,线性方程为：为I=2.0062C＋0.0069,相关系数为r=0.9967,检出限为6.0×10-8g/L线性范围为0.5×10-6—2.8×10-6mol/L,RSD=2.24%。该法简单快速,准确度和精密度均符合要求,回收率为89.5%—100.3%。
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| 关 键 词： | 铋膜电极 玻碳电极 溶出伏安法 苍耳子 |
Determination of Zinc in Cocklebur by Stripping Voltammetry with Bismuth-Film Electrode |
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| MA Zheng,Guo Zi-Ying.Determination of Zinc in Cocklebur by Stripping Voltammetry with Bismuth-Film Electrode[J].Chinese Journal of Spectroscopy Laboratory,2009,26(1):5-8. |
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| Authors: | MA Zheng Guo Zi-Ying |
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| Institution: | Science and Technology Development Strategy Research Place of Datong;Shanxi 037008;P.R.China;College of Chemical Engineering and Technology;Shanxi Datong University;Datong;Shanxi 037009;P.R.China |
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| Abstract: | A novel substitutive potentiometric stripping analysis （PSA） for the determination of Zn^2＋ via bismuth-film electrode was proposed. In KSCN buffer solutions,the sensitive stripping peaks of the ions were obtained and compared with that obtained using mercury-film electrodes. The adsorptive stripping peaks of Zinc under the best condition had good shape, high sensitivity, higher peak current. The linear regression equation is I= 2. 0062Cq-0. 0069,r= 0. 9967, the linear range is 0.5 ;K 10^-6mol/L-2. 8 × 10^-6mol/L, the relative standard deviation （RSD）is 2.24%, the recovery is about 89.5 %--100. 3 %. |
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| Keywords: | Bismuth-Film Electrode Glassy Carbon Electrode Stripping Voltammetry Cocklebur |
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