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| 铋膜电极电位溶出法测定水果罐头中的痕量Sn2+ | |
| 引用本文： | 朱伟伟,苏丹,刘旭辉,王齐.铋膜电极电位溶出法测定水果罐头中的痕量Sn2+[J].光谱实验室,2012,29(2):1029-1032. |
| 作者姓名： | 朱伟伟 苏丹 刘旭辉 王齐 |
| 作者单位： | 1. 河池学院化学与生命科学系,广西宜州市龙江路42号,546300 2. 滇虹药业有限公司,昆明市高新技术产业开发区科医路45号,650000 3. 昆明理工大学分析测试研究中心,昆明市学府路253号,650093 |
| 基金项目： | 广西高校重点建设实验室(桂教科研[2006]4号);昆明理工大学分析测试研究中心主任基金(2008001) |
| 摘 要： | 研究了同位镀铋膜法制备铋膜电极测定痕量Sn2+的电位溶出法。在0.1mol/L HAc-NaAc缓冲溶液(pH 4.8)中,通过开路富集于-1.2V进行电沉积,Sn2+与Bi3+被还原为单质富集于电极表面,在铋膜电极的电催化作用下再进行电位溶出,于-0.61V左右单质锡被氧化为Sn2+获得一灵敏的氧化溶出峰,其浓度与峰值成线性关系,线性范围为0.1—5.0mg/L,该方法的最低检出限为0.03mg/L(3σ)。利用该电极测定了水果罐头中痕量Sn2+的含量,并与国标方法作对比实验,结果表明该方法可用于实际样品分析。 |
| 关 键 词： | 铋膜电极 锡(Ⅱ) 电位溶出法 |
Determination of Sn2+ in Cans Food by Potentiometric Stripping Analysis with Bismuth Film Electrode |
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| ZHU Wei-Wei , SU Dan , LIU Xu-Hui , WANG Qi.Determination of Sn2+ in Cans Food by Potentiometric Stripping Analysis with Bismuth Film Electrode[J].Chinese Journal of Spectroscopy Laboratory,2012,29(2):1029-1032. | |
| Authors: | ZHU Wei-Wei SU Dan LIU Xu-Hui WANG Qi |
| Institution: | ZHU Wei-Wei SU Dana LIU Xu-Hui WANG Qib(Department of Chemistry and Life Science,Hechi Universtiy,Yizhou,Guangxi 546300,P.R.China)a(Kunming Dihon Pharmaceutical Co.Ltd.,Kunming 650000,P.R.China)b(Research Center for Analysis and Measurement,Kunming University of Science and Technology,Kunming 650093,P.R.China) |
| Abstract: | A measurement of the trace heavy metal Sn2+ on bismuth film electrode by potentiometric stripping analysis was proposed.The bismuth film electrode was generated in situ by depositing simultaneously.The Sn2+ and Bi3+ were accumulated on the electrode surface in an open circuit by cathodic reduction at-1.2V in 0.10mol/L acetate buffer(pH 4.8),then determined by potentiometric stipping analysis with the effect of bismuth film elelctrode electrocatalytic.It can get the attractive electric potential by the oxidation Sn to Sn2+ and the peak potential was at about-0.61V.A linear response was obtained over the concentration range 0.1—5.0mg/L and the lower detection limit was 0.03mg/L(3σ).The proposed method compared with the national standard method has been applied to the determination of tin in cans food with satisfactory results. |
| Keywords: | Bismuth Film Electrode Sn2+ Potentiometric Stripping Analysis |
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