苏丹红Ⅰ在锰卟啉/氧化石墨烯-多壁碳纳米管修饰电极上的电化学行为及测定  

Electrochemical Behaviors and Determination of Sudan Ⅰ on MnTMPy/GO-MWNTs/GC Modified Electrode

作　　者：罗宿星[1] 伍远辉[1] 代小容[1] 勾华[1] 

机构地区：[1]遵义师范学院化学化工学院,遵义563002

出　　处：《化学通报》2012年第11期1031-1035,共5页Chemistry

基　　金：贵州省科技厅社会发展科技攻关项目(黔科合SY字[2011]3128);贵州省高层次人才科研条件特助项目(TZJF-2010年-009号);遵义师范学院博士基金项目(2012BSJJ13)资助

摘　　要：制备了水溶性良好、带负电的氧化石墨烯-多壁碳纳米管(GO-MWNTs)纳米复合材料,用带正电的锰卟啉(MnTMPy)自组装到GO-MWNTs表面,构建了MnTMPy/GO-MWNTs/GC修饰电极。利用电化学阻抗谱对所制备的修饰电极进行表征,利用循环伏安法研究了苏丹红Ⅰ在电极上的电化学行为。结果表明,在50nmol/L～15μmol/L浓度范围内,苏丹红Ⅰ的差分脉冲伏安响应电流与其浓度呈现良好的线性关系,相关系数为0.996,检出限为20nmol/L。该方法可简便、快捷、灵敏地检测辣椒粉中苏丹红Ⅰ的含量。A hybrid nonmaterial GO-MWNTs,which could be well dispersed in aqueous solution and exhibited negative charges,was prepared.The positively charged manganese porphyrin（MnTMPy） was then immobilized onto GO-MWNTs at the surface of a glassy carbon（GC） electrode to form a MnTMPy/GO-MWNTs/GC electrode.The modified electrode was characterized by the electrochemical impedance spectroscopy（EIS）.Electrochemical behaviors of Sudan I on the modified electrode were studied by using cyclic voltammetry（CV）.The modified electrode showed a good linear current response for Sudan I in the range from 50 nmol/L to 15 μmol/L by differential pulse voltammetry with a correlation coefficient of 0.996 and a detection limit of 20 nmol/L.The mentioned electrochemical method can use for determining of Sudan I in chili powder simply,fast and sensitively.

关 键 词：苏丹红Ⅰ 氧化石墨烯 多壁碳纳米管 锰卟啉 

分 类 号：TB383.1[一般工业技术—材料科学与工程]