| 多壁碳纳米管修饰电极阳极溶出伏安法测定痕量银 |
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| 引用本文： | 明亮,习霞.多壁碳纳米管修饰电极阳极溶出伏安法测定痕量银[J].冶金分析,2011,31(5):45-48. |
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| 作者姓名： | 明亮 习霞 |
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| 作者单位： | 1. 南通大学杏林学院，江苏南通 226001；2. 南通大学化学化工学院，江苏南通 226001 |
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| 基金项目： | 南通市应用研究科技计划项目，南通大学自然科学项目，南通大学杏林学院科研基金 |
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| 摘 要： | 利用多壁碳纳米管修饰玻碳电极，通过优化支持电解质及pH值、修饰剂用量、富集电位及时间等测定条件，建立了测定痕量银的线性扫描阳极溶出伏安分析法。在pH 4.0的NaAc-HAc缓冲液中，－0.10 V电位下富集5 min后，于0.46 V处出现一灵敏度高、峰形较好的银阳极溶出峰,溶出峰电流与Ag+浓度在3.0×10-8 ~5.0×10-5 mol/L的范围呈良好的线性关系，Ag+的检出限为1.0×10-8 mol/L，在选定的最佳实验条件下一些常见的金属离子几乎不干扰银的测定。该法用于环境水样及锌合金样品中痕量银的测定，平均回收率在96% ~ 103%之间。
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| 关 键 词： | 碳纳米管 化学修饰电极 溶出伏安法 银 |
Determination of trace silver by anodic stripping voltammetry with multi-wall carbon nanotube modified electrode |
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| MING Liang,XI Xia.Determination of trace silver by anodic stripping voltammetry with multi-wall carbon nanotube modified electrode[J].Metallurgical Analysis,2011,31(5):45-48. |
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| Authors: | MING Liang XI Xia |
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| Affiliation: | 1. Xinglin College, Nantong University, Nantong 226001, China; 2. School of Chemistry and Chemical Engineering, Nantong University, Nantong 226001, China |
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| Abstract: | A linear sweep stripping voltammetry for the determination of trace silver was developed by using multi-wall carbon nanotube(MWCNT) modified glassy carbon electrode(GCE) and optimizing the determination conditions such as supporting electrolyte and pH,the amount of modifier,the accumulation potential and time.In NaAc-HAc buffer solution at pH 4.0,an anodic stripping peak with high sensitivity and good shape appeared at 0.46 V after accumulation at-0.10 V for 5 min.The stripping peak current varied linearly ... |
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| Keywords: | carbon nanotube chemically modified electrode stripping voltammetry silver |
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