碳纳米管修饰电极检测特丁基对苯二酚  

Highly sensitive determination of tertiary butyl hydroquinone at glassy carbon electrodes modified with multi-walled carbon nanotube films

作　　者：唐婧[1] 朱金坤[1] 郑胜彪[1] 汪徐春[1] 

机构地区：[1]安徽科技学院化学与材料工程学院,凤阳233100

出　　处：《分析试验室》2015年第8期934-938,共5页Chinese Journal of Analysis Laboratory

基　　金：安徽省教育厅优秀人才基金项目(2012SQRL147);安徽省教育厅自然科学项目(KJ2013047);安徽科技学院自然科学研究项目(ZRC2014438)资助

摘　　要：利用碳纳米管修饰玻碳电极（MWCNTs/GCE）,对特丁基对苯二酚（TBHQ）进行了检测,采用循环伏安法（CV）和差分脉冲伏安法（DPV）考察了TBHQ在裸电极和修饰电极上的电化学行为。M WCNTs/GCE对TBHQ的氧化具有较好的电催化活性,在修饰电极上的氧化还原峰电位差从261 m V减小到30 m V。在0.10 mol/L磷酸盐缓冲溶液（p H 7.0）中,扫速为50 m V/s时,此修饰电极的DPV响应与TBHQ浓度在2~250μmol/L范围内呈线性关系,检出限为0.1μmol/L（S/N=3）。此修饰电极可应用于食用油中TBHQ的测定,回收率为92.0%~104.0%。Tertiary butyl hydroquinone（ TBHQ） was detected by using multi-walled carbon nanotubes nanocomposites modified on glassy carbon electrodes（ MWCNTs/GCE）. The electrocatalysis capability of MWCNTs/GCE to TBHQ was investigated by cyclic voltammetry（ CV） and differential pulse voltammetry（ DPV） techniques. Compared with the bare GCE,MWCNTs/GCE exhibited outstanding electrocatalytic activity and reversibility towards the oxidation of TBHQ. The oxidation and reduction peak separation was decreased from261 m V for TBHQ at barn GCE to 30 m V for that at MWCNTs/GCE. Under optimal conditions,the oxidation peak currents were linear to TBHQ concentration in the range from 2 to 250 μmol/L with a detection limit of0. 1μmol/L. Moreover,MWCNTs/GCE exhibited excellent selectivity,reproducibility and long-term stability,and was successfully applied to the determination of TBHQ in edible oil samples and the recovery was found to be92. 0% ~ 104. 0%.

关 键 词：碳纳米管 特丁基对苯二酚 循环伏安法 差分脉冲伏安法 

分 类 号：TS227[轻工技术与工程—粮食、油脂及植物蛋白工程] O657.1[轻工技术与工程—食品科学与工程]