多壁碳纳米管化学修饰玻碳电极用于曲酸的伏安测定
Voltammetric Determination of Kojic Acid with the Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode
摘 要
考查了曲酸在多壁碳纳米管化学修饰电极上的电化学行为,相对于裸玻碳电极,多壁碳纳米管化学修饰电极测定曲酸的峰电流明显增加.示差脉冲伏安法测定曲酸的线性范围为1.0×10-5~1.0×10-3mol·L-1,检出限(3S/N)为5.0×10-6mol·L-1.用此修饰电极连续测定一种酱油样品的曲酸含量,得到一致的结果,而用裸玻碳电极时所得结果明显降低,由此可见,修饰电极的稳定性显著提高.方法用于酱油、黄酒等复杂样中曲酸的直接测定,加标平均回收率为99.5%,测定值的相对标准偏差均小于5%.
多壁碳纳米管
化学修饰电极
曲酸
Differential pulse voltammetry
Chemically modified electrode
Multi-wall carbon nanotubes
Kojic acid
Abstract
Electrochemical behavior of kojic acid at the multi-wall carbon nanotubes (MWCNT′s) modified glassy carbon electrode (GCE) was studied voltammetrically.As compared with the bare GCE,a remarkable increase of anodic peak current of kojic acid was obtained at the modified electrode.Linear relationship was found between values of peak current (Ip) and concentration of kojic acid in the range of 1.0×10-5-1.0×10-3mol·L-1 as determined by the differential pulse voltammetry (DPV).Detection limit (3S/N) of the method was found to be 5.0×10-6mol·L-1.Test for stability of the MWCNT′s modified GCE was made by successive determination of kojic acid in a soy sample and consistent results were obtained,while the results obtained by using bare GCE were decreased apparently.The proposed method was used for determination of kojic acid in some complex samples,e.g.,soy and millet wine,giving values of RSD′s (n=5) less than 5%,and of average recovery 99.5%.
中图分类号 O657.14
所属栏目 工作简报
基金项目 江苏州省教育厅自然科学基金(02KJB150003)
收稿日期 2007/12/8
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备注周君(1975-),女,江苏南通人,讲师,研究方向为电分析化学.
引用该论文: ZHOU Jun,DI Jun-wei. Voltammetric Determination of Kojic Acid with the Multi-wall Carbon Nanotubes Modified Glassy Carbon Electrode[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(3): 293～295
周君,狄俊伟. 多壁碳纳米管化学修饰玻碳电极用于曲酸的伏安测定[J]. 理化检验－化学分册, 2009, 45(3): 293～295
被引情况:
【1】马建春,张军,牛晶晶,王晋枝,刘欢,邵佳慧, "纳米金/垂直阵列碳纳米管修饰铜电极的制备及其对曲酸的电催化性能研究",理化检验－化学分册 52, 1267-1271(2016)
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参考文献
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【2】董煜.曲酸乳膏含量测定方法的改进[J].中国药事,2004,18(4):242-243．
【3】赵珊,李业鹏,赵海燕,等.离子对高效液相色谱法分析米曲霉发酵液中的曲酸[J].卫生研究,2003,32(4):384-385．
【4】胡俊明,段鹤君,赵月朝.高效液相色谱法测定祛斑类化妆品中常用的功效成分[J].卫生研究,2003,32(5):499-500．
【5】Shih Y,Zen J M.Voltammetric determination of kojic acid in cosmetic bleaching products using a disposable screen-printed carbon electrode[J].Electroanalysis,1999,11(4):229-233．
【6】Wang J.Real-time electrochemical monitoring: toward green analytical chemistry[J].Acc Chem Res,2002,35:811-816．
【7】袁倬斌,王月伶,张君,等.碳纳米管在电分析中的应用[J].化学通报,2004(7):473-476．
【8】Kuznetsova A,Mawhinney D B,Naumenko V,et al.Enhancement of adsorption inside of single-walled nanotubes: opening the entry ports[J].Chemical Physics Letters,2000,321:292-296．
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