分析测试学报2017，Vol.36Issue(10)：1178-1184,7.DOI:10.3969/j.issn.1004-4957.2017.10.002
多壁碳纳米管负载氢氧化铁纳米胶粒修饰玻碳电极固相微萃取及电化学检测三氯生
Determination of Triclosan by Cyclic Voltammetry with Solid Phase Micro-extraction on Multi-walled Carbon Nanotubes Supported Ferric Hydroxide Nanoparticles Modified Glassy Carbon Electrode
摘要
Abstract
In this paper,the enrichment behavior of triclosan on multi-walled carbon nanotubes supported ferric hydroxide nanoparticles modified glassy carbon electrode was investigated by cyclic voltammetry with solid-phase microextraction.The extraction process was observed to follow the first-order kinetic equation based on Temkin isothermal adsorption model.The cyclic voltammogram of triclosan on the modified electrode showed an irreversible oxidation peak at about 0.558 V.The linearity existed between the pH values and the oxidation peak potential indicated that the oxidation of triclosan was a transferred process of one electron accompanied by a proton.The oxidation peak current increased linearly with the increase of sweep rate,indicating that the oxidation reaction was controlled by surface adsorption.The linear relationship between the oxidation peak current and the logarithm of triclosan concentration in the range of 3.333 × 10-6-3.333 × 10-4 mol/L could be used to determine the concentration of triclosan with the detection limit of 3.333 × 10-6 mol/L.The method was used in detection of triclosan in hand sanitizers with good reproducibility and selectivity.Based on the cluster models of triclosan and ferric hydroxide nanoparticles,semi-empirical molecular orbital calculations were performed with PM7 in MOPAC2012.The thermodynamic and front orbit correlation coefficient results showed that a complex formed between triclosan and ferric ions was stable with the AG ＜ 0,and the electron transfer occurred in the formation of the triclosan complex.关键词
多壁碳纳米管/氢氧化铁纳米胶粒/三氯生/固相微萃取/玻碳电极Key words
multi-walled carbon nanotubes/colloidal ferric hydroxide nanoparticles/triclosan/solid phase microextraction/glassy carbon electrode分类
化学化工引用本文复制引用
那宝双,朱永春,王佳,辛士刚,张洪波..多壁碳纳米管负载氢氧化铁纳米胶粒修饰玻碳电极固相微萃取及电化学检测三氯生[J].分析测试学报,2017,36(10):1178-1184,7.基金项目
国家科技部国际合作重大项目资助(2004DFA02700) （2004DFA02700）
国家自然科学基金项目(20875063) （20875063）
辽宁教育厅项目(2004-c022) （2004-c022）
国家电分析重点实验室项目(2006-06) （2006-06）
沈阳市科技局基金(2007-GX-32) （2007-GX-32）
