Determination of vanillin by using gold nanoparticle-modified screen-printed carbon electrode modified with graphene quantum dots and Nafion

被引：29
作者：
Duran, Gema M. [1 ,2 ]
Llorent-Martinez, Eulogio J. [1 ,2 ]
Contento, Ana M. [1 ,2 ]
Rios, Angel [1 ,2 ]
机构：
[1] Univ Castilla La Mancha, Dept Analyt Chem & Food Technol, Camilo Jose Cela Av, E-13071 Ciudad Real, Spain
[2] Reg Inst Appl Chem Res IRICA, Camilo Jose Cela Av, E-13071 Ciudad Real, Spain
来源：
MICROCHIMICA ACTA | 2018年 / 185卷 / 03期
关键词：
Amperometric assay; Electrode customization; Electrochemical devices; Food samples; Nanocomposite assembly; SENSITIVE VOLTAMMETRIC DETERMINATION; COMPOSITE MODIFIED ELECTRODE; ELECTROCHEMICAL SENSOR; FOOD SAMPLES; DOPAMINE; ACID; EXTRACT; FILM;
D O I：
10.1007/s00604-018-2738-1
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A voltammetric analytical assay for the selective quantification of vanillin is described. It is based on the use of a gold nanoparticle-modified screen-printed carbon electrode (SPCE) modified with graphene quantum dots (GQD) in a Nafion matrix. The GQD were synthesized by an acidic thermal method and characterized by UV-Vis, photoluminescence, and FTIR spectroscopy. The modified SPCE displays a strongly enhanced response to vanillin. Linear sweep voltammetry (LSV) and differential pulse voltammetry (DPV) were applied to optimize the methods. The analytical assay has linear responses in the 13 to 660 mu M and 0.66 to 33 mu M vanillin concentration ranges. The detection limits are 3.9 mu M and 0.32 mu M when using LSV and DPV, respectively. The analytical assay is selective and stable. It was applied to the determination of vanillin in several food samples with satisfactory results. Recoveries from spiked samples ranged between 92.1 and 113.0%.
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页数：8
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