灯盏花素在多壁碳纳米管丝网印刷电极上的电化学行为及测定  

Electrochemical Determination of Breviscapine at the Multi-Walled Carbon Nanotube Screen Printed Electrode

作　　者：王正玮[1,2] 张茜[1,2] 闫莉莉[1,2] 高云涛[1,2] 王振峰[1,2] 

机构地区：[1]云南民族大学化学与生物技术学院,云南昆明650500 [2]民族药资源化学国家民委-教育部重点实验室,云南昆明650500

出　　处：《分析科学学报》2012年第6期823-826,共4页Journal of Analytical Science

基　　金：云南省社会发展科技项目(No.2007B148M);民族药资源化学国家民委-教育部重点实验室开放基金(No.MJY07010)

摘　　要：采用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了黄酮化合物灯盏花素在多壁碳纳米管丝网印刷电极(MWCNT/SPE)上的电化学行为及其测定方法。实验表明,在pH=5.0的HAc-NaAc缓冲溶液中,浓度为5.0×10-4 g/L的灯盏花素在MWC-NT/SPE电极上出现了一对准可逆氧化还原峰,峰电位Epa=0.21V,Epc=-0.05V,△E=0.26V,峰电流ipa=1.18μA,ipc=0.205μA,ipa/ipc=5.76。灯盏花素的DPV氧化峰电流值与其浓度在1.2×10-4～2.8×10-3g/L范围内呈线性关系(R=0.9990),检出限为1.2×10-4g/L。结果表明,该法测定灯盏花素便捷、可靠、较灵敏。The electrochemical behaviors and determination of breviscapine on the multi-walled carbon nanotube screen printed electrode（MWCNT/SPE） were investigated by cyclic voltammetry（CV） and differental pulse voltammetry（DPV）. When the concentration of breviscapine was 5. 0 × 10^-4 g/L, a couple of sensitive and quasi-reversible redox peaks of breviscapine was obtained at MWCNT/SPE with 0.21 V of Epa and -0.05 V of Epo（△E=0.26 V） in ethylic acid buffer solution（pH=5.0） ,and ipa and i pc were 1. 184 uA arid 0. 2054 uA（ipa/ipc=5. 764）,respectively. The oxidation peak was linearly related to the concentration of breviscapine in the range of 1.2 × 10 ^-4-2.8 × 10^-3 g/L with a detection limit of 1.2×10^-4 g/L. The results showed that the method is convenient,reliable and sensitive and could be used for the determination of breviscapine.

关 键 词：灯盏花素 多壁碳纳米管 丝网印电极 循环伏安法 差分脉冲伏安法 

分 类 号：O657.1[理学—分析化学]