数字农科院2.0

Highly catalytic Ce-based MOF for powering electrochemical aptasensing toward evaluating dissolution rate of microelement copper from tea-leaves

文献类型： 外文期刊

作者： Haili Chen;Jiaoling Wang;Wenwen Zhang;Yahui Li;Xinai Zhang;Xiaowei Huang;Yongqiang Shi;Yucheng Zou;Zhihua Li;Jiyong Shi;Xiaobo Zou

作者机构：

关键词： Bioavailability;Cerium-based metal-organic framework;Electrochemical aptasensor;Microelement copper;Tea infusion

期刊名称： Journal of Food Composition and Analysis

ISSN： 0889-1575

年卷期： 2025 年 140 卷

页码：

收录情况： SCIE（2025版）

摘要： The effective sensing toward dissolution rate of microelements is beneficial for evaluating nutrition and hygiene during tea drinking. Herein, a useful electrochemical mode was developed for tracking microelement copper (Cu) as a potentially toxic element but with physiological effects. In this respect, Cu2+-dependent aptamer was designed to identify the analytes for eliminating the matrix interferences of tea-leaves, thereby greatly reducing error sources. Moreover, assisting with its relatively easy conversion between Ce(III) and Ce(IV), cerium-based metal-organic framework (MOF(Ce)) was used in peroxidase-like catalytic reaction for signal output and sensitivity enhancement. The nanozyme-sensitized electrochemical sensor exhibited desirable properties toward tracking Cu content with dynamic range from 10−9 mol L−1 to 10−3 mol L−1 and limitation of detection down to 0.46 nmol L−1 (S/N = 3). Moreover, it allows for tracking dissolution rate of Cu in nonfermented tea, semifermented tea, and fermented tea under natural brewing for 15, 10 and 5 min. The relative error (RE) maximum between this sensor and inductively coupled plasma atomic emission spectrometry (ICP-AES) was less than 7.50 %. The results demonstrated that the dissolution rate of Cu increased with prolonging the brewing time even though the relatively low dissolution of brewing tea when compared with Cu in dried tea-leaves. As advantages of anti-interference ability, good accuracy, attractive practical performance are achieved, it is expected that the simple and sensitive pattern will be helpful for assessing the bioavailability of microelements during tea drinking.

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