| 邻苯三酚红修饰碳糊电极吸附伏安法测定痕量锑的研究 |
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| 引用本文： | 郭会时,李益恒,谢红旗.邻苯三酚红修饰碳糊电极吸附伏安法测定痕量锑的研究[J].湘潭大学自然科学学报,2001,23(1):68-71. |
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| 作者姓名： | 郭会时 李益恒 谢红旗 |
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| 作者单位： | 1. 广东韶关大学化学系,
2. 湘潭大学化学化工学院, |
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| 摘 要： | 研制了采用邻苯三酚红（PR）作修饰剂的碳糊修饰电极，并利用所制备的电极作工作电极建立了测定痕量锑的方法．在0.050mol/L的H3PO4溶液中，于0V（vs.SCE）搅拌富集时，Sb（Ⅲ）与修饰电极表面的PR生成电活性络合物并吸附富集于电极表面，然后在-0.50V静止还原后，再进行阳极化扫描，在0.05V左右获得一灵敏的锑溶出峰，二次导数峰电流与锑浓度在8.0×10
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| 关 键 词： | 锑 邻苯三酚红 碳糊修饰电极 吸附伏安法 含量测定 电极反应机理 水样 |
| 文章编号： | 1000－5900(2001)01－0068－04 |
| 修稿时间： | 2000年4月16日 |
Determination of Trace
Antimony by Adsorptive Stripping Voltammetry with Pyrogallol Red Modified Carbon Paste
Electrode |
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| GUO Hui-shi,LI Yi-heng,XIE Hong-qi.Determination of Trace
Antimony by Adsorptive Stripping Voltammetry with Pyrogallol Red Modified Carbon Paste
Electrode[J].Natural Science Journal of Xiangtan University,2001,23(1):68-71. |
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| Authors: | GUO Hui-shi LI Yi-heng XIE Hong-qi |
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| Institution: | GUO Huishi 1,LI Yiheng 2,XIE Hongqi 2 |
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| Abstract: | A pyrogallol red modified carbon paste electrode was used as a working electrode for the selective preconcentration of antimony(Ⅲ). The antimony(Ⅲ) was accumulated on the electrode surface at 0 V(vs.SCE) by the formation of the complex in 0.050 mol/L H3PO4 solution, and determined by anodic stripping voltammetry after cathodic reduction at -0.50 V. The peak potential is at about 0.05 V. The concentration of antimony(Ⅲ) is directly proportional to the second-order derivative peak height over the range from 8.0×10-10 mol/L to 2.8×10-7 mol/L.The detection limit for antimony(Ⅲ) is as low as 4×10-10 mol/L.The mechanism of electrode reaction was discussed as well. The proposed method has been applied to the determination of antimony(Ⅲ) in water with satisfactory results. |
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| Keywords: | Antimony pyrogallol red modified carbon paste electrode adsorptive stripping voltammetry |
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