A novel electrochemical paper sensor for low-cost detection of 5-methyl-tetrahydrofolate in egg yolk

文献类型： 外文期刊

第一作者： Yu, Yanan

作者： Yu, Yanan;Sun, Dandan;Liu, Yuning;Zhao, Qingyu;Qin, Yuchang;Zhang, Junmin;Yu, Yanan;Sun, Dandan;Liu, Yuning;Zhao, Qingyu;Qin, Yuchang;Zhang, Junmin

作者机构：

关键词： Egg yolk; 5-Methyltetrahydrofolate; Paper sensor; Electrochemical detection

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2021 年 346 卷

页码：

收录情况： SCI

摘要： An electrochemical deposition method was used to fabricate a gold nanoflower (AuNF) and carbon nanoparticle (CNP) modified carbon paper (CP) sensor (AuNFs-CNPs/CP) for the low-cost detection of 5-methyltetrahydrofolate (5-mTHF) in egg yolk. AuNF morphology and structures were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), revealing nanoflower sizes in the 50 to 200 nm range. AuNFs formed on the sensor were in the Au0. We evaluated 5-mTHF assay performance using cyclic voltammetry, differential pulse voltammetry and chronoamperometry. The AuNFs-CNPs/CP sensor detected 5-mTHF concentrations in the ranges from 1 to 5 mg L-1 and 1-20 mu g L-1, with an excellent limit of detection of 1 mu g L-1 and good selectivity toward 5-mTHF, when compared to other potentially interfering molecules in samples. The AuNFs-CNPs/CP sensor was also used to detect 5-mTHF in folate-rich, and was found to be twice than that of ordinary egg yolk.

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