化学修饰电极对乙基麦芽酚的测定
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摘要
通过循环伏安法将氧化石墨烯和L-谷氨酸混合液修饰在玻碳电极表面,制备了聚L-谷氨酸/石墨烯修饰电极。通过循环伏安法及差分脉冲伏安法,研究乙基麦芽酚的电化学性质。实验结果表明:最佳条件下,乙基麦芽酚分别在0.951 V和0.852 V处出现氧化峰。其浓度分别在6.00×10-6～1.00×10-4 mol/L及4.00×10-6～4.00×10-4 mol/L范围内呈现良好的线性关系,检出限为4.0×10-7 mol/L。用于检测食品中的乙基麦芽酚,结果满意。
A poly-L-glutamic acid/graphene modified electrode was prepared in the mixture of graphene oxide and L-glutamic acid by cyclic voltammetry. The electrochemical behavior of ethyl maltol was studied by cyclic voltammetry and differential pulse voltammetry. The results showed that ethyl maltol had the oxidation peaks at0.951 V and 0.852 V under the optimal conditions respectively. There was a good linear relationship at the concentrations from 6.00×10-6 to 1.00×10-4 mol/L and from 4.00×10-6 to 4.00×10-4 mol/L respectively. The detection limit was 4.0×10-7 mol/L. Two methods were used to detect ethyl maltol in foods with satisfactory results.
A poly-L-glutamic acid/graphene modified electrode was prepared in the mixture of graphene oxide and L-glutamic acid by cyclic voltammetry. The electrochemical behavior of ethyl maltol was studied by cyclic voltammetry and differential pulse voltammetry. The results showed that ethyl maltol had the oxidation peaks at0.951 V and 0.852 V under the optimal conditions respectively. There was a good linear relationship at the concentrations from 6.00×10-6 to 1.00×10-4 mol/L and from 4.00×10-6 to 4.00×10-4 mol/L respectively. The detection limit was 4.0×10-7 mol/L. Two methods were used to detect ethyl maltol in foods with satisfactory results.
引文
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[12]王婉君,马伟,孙登明.异烟肼与牛血清白蛋白相互作用的光谱和电化学研究[J].分析科学学报,2016,32(3):340-344.
[13]汤优霞,汪燕鸣,孙登明.L-半胱氨酸和镍分层修饰电极的制备及对黄岑苷的测定[J].分析科学学报,2015,31(6):769-773.
[14]Chen M F,Ma X Y.Electrochemical determination of ethyl maltol on a glass carbon electrode mofidied with graphene[J].Journal of the Chilean Chemical Society,2013,58(3):1918-1920.
[15]赵庆侠,马伟,孙登明.银掺杂聚L-苏氨酸修饰电极的制备及对多巴胺的测定.井冈山大学学报:自然科学版,2011,32(6):27-32.
[16]杜海军,汪念.预处理玻碳电极线性扫描伏安法测定槲皮素的研究[J].化学试剂,2012,34(7):629-632.
[2]杨海燕.多功能增香剂--麦芽酚与乙基麦芽酚[J].中国食品工业,1998(11):29-31.
[3]景赞,胡丹,刘超.GC-MS/MS测定调味油中麦芽酚和乙基麦芽酚[J].中国食品添加剂,2017(6):209-213.
[4]林灵超,吴方圆.高效液相色谱法同时测定牛奶中的香兰素与乙基香兰素[J].化学分析计量,2013,22(2):60-62.
[5]Yue Y Y,Liu J M,Ji H X,et al.The investigation of the binding behavior between ethyl maltol and human serum albumin by multi-spectroscopic methods and molecular docking[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2012,1996(5):316-332.
[6]宁霄,何欢,丁宏,等.超高效液相色谱-串联质谱法同时测定食品中麦芽酚、乙基麦芽酚、香兰素、甲基香兰素和乙基香兰素[J].食品安全质量检测学报,2017,8(7):2555-2562.
[7]陈毓芳,林海丹,官咏仪,等.高效液相色谱法测定饮料中乙基麦芽酚含量的不确定度评定[J].食品安全质量检测学报,2018,9(9):2175-2180.
[8]Mahnaz Nozohour Yazdi,Yadollah Yamini,Hamid Asiabi.Fabrication of polypyrrole-silver nanocomposite for hollow fiber solid phase microextraction followed by HPLC/UV analysis for determination of parabens in water and beverages samples[J].Journal of Food Composition and Analysis,2018,74:18-26.
[9]周艳梅,王亚萍,马同森,等.流动注射化学发光法测定饮料中乙基麦芽酚[J].食品研究与开发,2011,32(9):159-161.
[10]李畅,董学芝,王爱芳,等.荧光素法测定乙基麦芽酚的含量[J].食品研究与开发,2008,29(6):101-103.
[11]倪永年,王苹苹.伏安法结合化学计量学测定食品中的香兰素和乙基麦芽[J].南昌大学学报:理科版,2012,36(1):43-46.
[12]王婉君,马伟,孙登明.异烟肼与牛血清白蛋白相互作用的光谱和电化学研究[J].分析科学学报,2016,32(3):340-344.
[13]汤优霞,汪燕鸣,孙登明.L-半胱氨酸和镍分层修饰电极的制备及对黄岑苷的测定[J].分析科学学报,2015,31(6):769-773.
[14]Chen M F,Ma X Y.Electrochemical determination of ethyl maltol on a glass carbon electrode mofidied with graphene[J].Journal of the Chilean Chemical Society,2013,58(3):1918-1920.
[15]赵庆侠,马伟,孙登明.银掺杂聚L-苏氨酸修饰电极的制备及对多巴胺的测定.井冈山大学学报:自然科学版,2011,32(6):27-32.
[16]杜海军,汪念.预处理玻碳电极线性扫描伏安法测定槲皮素的研究[J].化学试剂,2012,34(7):629-632.