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[1] Guo Huishi, Xiao Pengfeng, Nie Libo, Li Yiheng, et al. Determination of trace amount of antimony(Ⅲ)by adsorptionvoltammetry on carbon paste electrode [J]. Journal of Southeast University (English Edition), 2004, 20 (2): 221-225. [doi:10.3969/j.issn.1003-7985.2004.02.020]
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Determination of trace amount of antimony(Ⅲ)by adsorptionvoltammetry on carbon paste electrode()
碳糊电极吸附伏安法测定痕量锑
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
20
Issue:
2004 2
Page:
221-225
Research Field:
Chemistry and Chemical Engineering
Publishing date:
2004-06-30

Info

Title:
Determination of trace amount of antimony(Ⅲ)by adsorptionvoltammetry on carbon paste electrode
碳糊电极吸附伏安法测定痕量锑
Author(s):
Guo Huishi1;  Xiao Pengfeng1;  Nie Libo1;  Li Yiheng2;  He Nongyue1
1Chien-Shiung Wu Laboratory, Southeast University, Nanjing 210096, China
2Department of Chemistry, Xiangtan University, Xiangtan 411105, China
郭会时1;  肖鹏峰1;  聂立波1;  李益恒2;  何农跃1
1东南大学吴健雄实验室, 南京 210096; 2湘潭大学化学系, 湘潭 411105
Keywords:
antimony;  bromopyrogallol red;  carbon paste electrode;  adsorptive voltammetry
锑;  溴邻苯三酚红;  碳糊电极;  吸附伏安法
PACS:
O657.4
DOI:
10.3969/j.issn.1003-7985.2004.02.020
Abstract:
A sensitive method is described for the determination of trace antimony based on the antimony-bromopyrogallol red(BPR)adsorption at a carbon paste electrode(CPE). Three steps were involved in the overall analysis: preconcentration, reduction and stripping. Optimal conditions were found to be an electrode containing 25% paraffin oil and 75% high purity graphite powder as working electrode; a 0. 10 mol/L HCl solution containing 40 μmol/L BPR as accumulation medium; a 0. 20 mol/L HCl solution as reduction and stripping electrolyte; accumulation time, 150 s; reduction potential and time, -0. 50 V, 60 s; scan range from -0. 50 to 0. 20 V. Interferences by other ions were studied as well. The detection limit was found to be 0. 5 nmol/L for 150 s preconcentration. The linear range was from 1. 0 nmol/L to 0. 50 μmol/L. Application of the proposed method to the determination of antimony in water and human hair samples gave good results.
根据锑与溴邻苯三酚红(BPR)生成的络合物在碳糊电极上的吸附特性, 建立了测定痕量锑的吸附伏安法. 整个分析过程分3个步骤: 吸附富集、还原和溶出. 用单因素变化法得出最佳试验条件为: 以含40 μmol/L BPR的0. 10 mol/L HCl为富集底液; 富集时间150 s; 还原和溶出介质为0. 20 mol/L HCl; 还原电位为-0. 50 V; 还原时间为60 s;扫描范围为-0.5~0.20 V. 考察了共存离子的影响. 二次导数溶出峰电流与锑(Ⅲ)浓度在1. 0 nmol/L~0. 50 μmol/L范围内呈良好的线性关系, 检出限达0. 5 nmol/L. 该方法已成功应用于人发和水样中锑的测定.

References:

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[8] Wei Xianyou, Tan Jianxin. Polarographic adsorptive complex catalytic wave of antimony(Ⅲ)and tin(IV)with 7-iodo-8-hydroxyquinolin-5-sulfonic acid(Ferron)and its application [J]. Chinese Journal of Analysis Laboratory, 1996, 15(3): 58-61.(in Chinese)
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Memo

Memo:
Biographies: Guo Huishi(1972—), male, graduate; He Nongyue(corresponding author), male, doctor, professor, nyhe1958@163.com.
Last Update: 2004-06-20