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线状纳米金修饰碳纤维超微电极检测芦荟大黄素
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作者单位
杨莉莉,王婷婷,鲍昌昊,程寒 1.中南民族大学药学院2.中南民族大学民族药学国家级实验教学示范中心 
基金项目:国家自然科学基金项目(21205144);中央高校基本科研业务费专项资金项目(CZY18036);民族医药学会项目(2017KYXM-M106-81);中南民族大学研究生学术创新基金后期资助项目
中文摘要:该文建立了芦荟大黄素(AE)的电化学检测方法。通过柠檬酸三钠还原氯金酸制备线状纳米金,采用一步恒电位沉积方法将线状纳米金沉积在碳纤维超微电极(CFME)表面,考察了电极修饰前后对AE的电催化性能,得到最佳修饰时间为12 min。结果表明,线状纳米金修饰碳纤维电极(LGN/CFME)的氧化峰电流与AE浓度在2.0×10-6~1.0×10-4 mol/L范围内呈良好线性关系,线性方程为Ip(nA)=0.318 1C(μmol/L)+25.01,r2=0.965 3,检出限(S/N=3)为6.19×10-7 mol/L,说明此方法可用于芦荟汁中AE的定量检测。
中文关键词:线状纳米金  碳纤维超微电极  电催化性能  芦荟大黄素(AE)
 
Determination of Aloe Emodin by Carbon Fiber Ultramicroelectrodes with Linear Gold Nanoparticles
Abstract:An electrochemical method with linear gold nanoparticles modified carbon fiber ultramicroelectrodes(LGN/CFME) was proposed for the detection of aloe emodin(AE).The LGN/CFME were prepared with chloroauric acid reduced with sodium citrate,depositing on the surface of CFME by one step potentiostatic deposition.The electrocatalytic performance of the CFME towards AE before and after electrode modification was investigated,and the optimal deposition time was 12 min.Results showed that there was a good linear relationship between oxidation peak current and AE concentration in the range of 2.0×10-6-1.0×10-4 mol/L,with a correlation coefficient(r2) of 0.965 3 and a linear regression equation of Ip(nA)=0.318 1 C(μmol/L)+25.01.The detection limit(S/N=3) was 6.19×10-7 mol/L.The method could be applied in the determination of AE in aloe juice.
Key Words:linear gold nanoparticles  carbon fiber ultramicroelectrodes  electrocatalytic performance  aloe emodin(AE)
引用本文:杨莉莉,王婷婷,鲍昌昊,程寒.线状纳米金修饰碳纤维超微电极检测芦荟大黄素[J].分析测试学报,2020,39(3):401-405.
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