Square wave voltammetric determination of Hg(II) using thiol functionalized chitosan-multiwalled carbon nanotubes nanocomposite film electrode

被引：60

作者：

Deng, Wenfang ^{[1
]}

Tan, Yueming ^{[1
]}

Li, Yunyong ^{[1
]}

Wen, Yanqing ^{[1
]}

Su, Zhaohong ^{[1
]}

Huang, Zhao ^{[1
]}

Huang, Suqing ^{[1
]}

Meng, Yue ^{[1
]}

Xie, Qingji ^{[1
]}

Luo, Yueping ^{[2
]}

Yao, Shouzhuo ^{[1
]}

机构：

[1] Hunan Normal Univ, Coll Chem & Chem Engn, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ China, Changsha 410081, Hunan, Peoples R China

[2] Environm Monitoring Ctr Hunan Prov, Changsha 410004, Hunan, Peoples R China

来源：

MICROCHIMICA ACTA | 2010年 / 169卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

Thiol functionalized chitosan; Multiwalled carbon nanotubes; Hg(II); Square wave stripping voltammetry; METAL-IONS; AQUEOUS-SOLUTION; PASTE ELECTRODE; MERCURY; SPECIATION; SORBENTS; MASS;

D O I：

10.1007/s00604-010-0366-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Covalent tethering of cysteamine to chitosan using glutaraldehyde yields thiol-functionalized chitosan (CS-SH). It was cast on a glassy carbon electrode which is found to be very stable in acidic solutions and to possess a strong affinity for Hg(II) ions as confirmed by quartz crystal microbalance measurements. A glassy carbon electrode modified with a nanocomposite made from CS-SH and multiwalled carbon nanotubes was applied for square wave voltammetric determination of Hg(II). The procedure comprises the steps of (a) chemical accumulation of Hg(II) under open-circuit condition and (b) electrochemical determination of Hg(II). Linear responses are obtained in the range from 10 to 140 nM, with a limit of detection of 3 nM (S/N = 3) under optimized conditions. The electrode was applied to the determination of Hg(II) in water samples with satisfactory recoveries.

引用

页码：367 / 373

页数：7

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