摘要
目的:研究苏丹红Ⅰ在核壳结构纳米复合粒子修饰玻碳电极(NiFe2O4@Au/GC)上的电化学行为,建立测定苏丹红Ⅰ含量的电化学分析新方法。方法:电化学阻抗法(EIS)、线性扫描伏安法(LSV)、差分脉冲伏安法(DPV)。结果:在6×10-7~1.5×10-5mol.L-1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(r=0.9941),检出限为2×10-7mol.L-1。结论:本方法简便、快捷,灵敏度高,可用于辣椒粉、辣椒酱中苏丹红Ⅰ的检测。
Objective:To study electrochemical behaviors of SudanⅠin core/shell NiFe2O4@Au nanoparticles modified electrode and establish a novel method for the determination of Sudan Ⅰ contents.Methods:Electrochemical impedance spectroscopy(EIS),linear sweep voltammetry(LSV)and differential impulsive voltammetry(DPV) were used.Results:The modified electrode showed a good linear current response for Sudan Ⅰ in the range from 6×10-7 to 1.5×10-5 mol·L-1 by differential pulse voltammetry with a correlation coefficient of 0.9941.Detection limit of the method was 2×10-7 mol·L-1.Conclusion:The established method is simple,fast and sensitive,which can be used for the determination of Sudan Ⅰ in spiked pepper powder and sauce samples.
出处
《药物分析杂志》
CAS
CSCD
北大核心
2012年第8期1440-1442,1464,共4页
Chinese Journal of Pharmaceutical Analysis
基金
贵州省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经费项目(TZJF-2010年-009号)
关键词
修饰电极
磁性纳米粒子
苏丹红Ⅰ电化学
食品药品添加剂测定
modified electrode
magnetic nano-particles
SudanⅠ electrochemistry
food and drug additives determination