| 公维磊,王长芹,杨金玲,张雪文,辛化雷.铋膜电极方波溶出伏安法测定痕量PbCd[J].济宁医学院学报,2011,(1):40-43 |
| 铋膜电极方波溶出伏安法测定痕量PbCd |
| In-situ plating bismuth film on glass carbon electrode for the determination of lead and cadmium by square wave stripping voltammetry |
| 投稿时间：2010-10-05 |
| DOI：10.3969/j.issn.1000-9760.2011.01.016 |
| 中文关键词: 铋膜电极|方波溶出伏安法|铅|镉 |
| 英文关键词: Bismuth film-plated electrode|Square wave stripping voltammetry|Lead|Cadmium |
| 基金项目:济宁医学院2008年青年科学基金资助项目 |
| 作者 | 单位 | | 公维磊 | 济宁医学院医学检验学系, 山东济宁 272067 | | 王长芹 | 济宁医学院医学检验学系, 山东济宁 272067 | | 杨金玲 | 济宁医学院医学检验学系, 山东济宁 272067 | | 张雪文 | 济宁医学院公共卫生学院, 山东济宁 272067 | | 辛化雷 | 济宁医学院医学检验学系学生, 山东济宁 272067 |
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| 中文摘要: |
| 目的 考察并优化同位镀铋膜测定Pb、Cd的条件。方法 采用方波溶出伏安法,以铋膜电极作为电极测定食品中微量Pb、Cd。结果 Pb、Cd在铋膜电极上可得到灵敏的溶出峰,Pb、Cd的溶出电位分别为0.50 V和0.77 V。当电沉积时间为180 s时,Pb、Cd的检出限分别达1.10μg/L和2.0μg/L,RSD分别为3.5%和2.5%,Pb、Cd在0~100μg/L出现良好的线性关系(r≥0.99)。结论 利用本方法 测定了样品中Pb的含量,并与石墨炉原子吸收分光光度法做了对比,结果令人满意,同时使用铋膜电极可避免使用汞膜电极带来的环境污染。 |
| 英文摘要: |
| Objective The experiment conditions of the determination of lead and cadmium by bismuth film-plated electrode were investigated and optimized.Methods Bismuth film-plated glass-carbon electrode was prepared by in-situ plating for the determination of trace lead in food by square wave stripping voltammentry.Results Sensitive stripping peak of lead and cadmium was obtained at the potential of -0.50V and -0.77V.Following a 180 s preconcentration, the oxidation peak currents changed linearly with the concentration of Pb2+ and Cd2+ over the range from 0 μg/L to 100 μg/L(r≥0.99), and the detection limits of lead and cadmium were 1.1μg/L and 2.0μg/L respectively.RSD were 3.5% and 2.5% respectively.Conclusion The bismuth film-plated electrode was applied to the determination of Pb in preserved egg.Compared with Graphite furnace atomic absorption spectrometry, the concordance of results was satisfactory. |
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