Electrochemical needle sensor based on a B, N co-doped graphene microelectrode array for the on-site detection of salicylic acid in fruits and vegetables

文献类型： 外文期刊

第一作者： Zhang, Jie

作者： Zhang, Jie;Li, Mingji;Li, Cuiping;Xuan, Xiuwei;Li, Hongji;Lyu, Mingjie

作者机构：

关键词： B and N co -doped vertical graphene; Microelectrode array; Salicylic acid; Living plant; Electrochemical sensor

期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）

ISSN： 0308-8146

年卷期： 2024 年 449 卷

页码：

收录情况： SCI

摘要： In this study, a microelectrode array sensor based on boron and nitrogen co -doped vertical graphene (BNVG) was assembled to quantify salicylic acid (SA) in living plants. The influence of B and N contents on the electrochemical reaction kinetics and SA response signal was investigated. A microneedle sensor with three optimized BNVG microelectrodes (3.57 at.% B and 3.27 at.% N) was used to quantitatively analyze SA in the 0.5 -100 mu M concentration range and pH 4.0 -9.0, with limits of detection of 0.14 -0.18 mu M. Additionally, a quantitative electrochemical model database based on the BNVG microelectrode sensor was constructed to monitor the growth of cucumbers and cauliflowers, which confirmed that the SA level and plant growth rate were positively correlated. Moreover, the SA levels in various vegetables and fruits purchased from the market were measured to demonstrate the practical application prospects for on -site inspection and evaluation.

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