黄嘌呤在离子液体-纳米金-碳纳米管复合物修饰电极上的电化学行为 |
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引用本文: | 范双双.黄嘌呤在离子液体-纳米金-碳纳米管复合物修饰电极上的电化学行为[J].分析科学学报,2010,26(2). |
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作者姓名: | 范双双 |
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作者单位: | 承德民族师范高等专科学校化学系,河北承德,067000 |
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摘 要: | 研究了黄嘌呤在离子液体-纳米金-碳纳米管修饰玻碳电极上的电化学行为。结果表明,在0.1mol/L磷酸盐(pH=4.4)介质中,修饰电极对黄嘌呤氧化具有强的电催化作用,黄嘌呤在0.9V(vs.SCE)左右产生一灵敏的氧化峰。在优化的实验条件下,用此峰测定黄嘌呤的线性范围为1.5×10-7~1.0×10-5mol/L,检出限为3.5×10-8mol/L。该修饰电极具有良好的重现性和稳定性。
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关 键 词: | 黄嘌呤 碳纳米管 离子液体 纳米金 修饰电极 |
Electrochemical Behaviors of Xanthine at a Carbon Nanotuble-Ionic Liquids-Nanogold Complex Modified Electrode |
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Abstract: | The electrochemical behavior of xanthine on the multi-wall carbon nanotuble(MCNT)-ionic liquids-nanogold modified electrode was investigated. The results showed that the modified electrode exhibited electrocatalysis to xanthine oxidation in 0.1 mol/L phosphate buffer(pH=4.4). The oxidation peak potential was about 0.9 V(vs.SCE). The oxidation peak current was linear to the concentration of xanthine in the range of 1.5×10~(-7)~1.0×10~(-5) mol/L. The detection limit was about 3.5×10~(-8) mol/L. This method was applied to the determination of xanthine in simulant samples with satisfactory results. |
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Keywords: | Xanthine Carbon nanotube Ionic liquids Nanogold Modified electrode |
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