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  1. No Access

    Article

    Porphyrin-based covalent organic framework as oxidase mimic for highly sensitive colorimetric detection of pesticides

    A covalent organic framework–based strategy was designed for label-free colorimetric detection of pesticides. Covalent organic framework–based nanoenzyme with excellent oxidase-like catalytic activity was synt...

    Qingju Liu, Junyi Zhu, Hui Wang, Yunxia Luan, Zhikun Zhang in Microchimica Acta (2024)

  2. No Access

    Article

    An aptamer affinity column for purification and enrichment of aflatoxin B1 and aflatoxin B2 in agro-products

    We have developed an aptamer affinity column (AAC) for the purification and enrichment of trace aflatoxin B1 (AFB1) and aflatoxin B2 (AFB2) in genuine agro-products through the covalent conjugation of amino modif...

    Hongmei Liu, Ying Zhao, Anxiang Lu, ** Ye… in Analytical and Bioanalytical Chemistry (2020)

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    Article

    Affinity capture of aflatoxin B1 and B2 by aptamer-functionalized magnetic agarose microspheres prior to their determination by HPLC

    A novel adsorbent is described for magnetic solid-phase extraction (MSPE) of the aflatoxins AFB1 and AFB2 (AFBs). Magnetic agarose microspheres (MAMs) were functionalized with an aptamer to bind the AFBs which th...

    Hongmei Liu, Anxiang Lu, Hailong Fu, Bingru Li, Meihua Yang… in Microchimica Acta (2018)

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    Article

    An oligosorbent-based aptamer affinity column for selective extraction of aflatoxin B2 prior to HPLC with fluorometric detection

    The article describes an aptamer affinity column for selective solid-phase extraction of aflatoxin B2 (AFB2). Amino-modified aptamer against AFB2 was immobilized on CNBr-activated Sepharose through a covalent bon...

    Hongmei Liu, Yunxia Luan, Anxiang Lu, Bingru Li, Meihua Yang… in Microchimica Acta (2017)

  5. No Access

    Article

    Visual and microplate detection of aflatoxin B2 based on NaCl-induced aggregation of aptamer-modified gold nanoparticles

    We describe a fast and sensitive method for the detection of aflatoxin B2 (AFB2) that is based on the addition of AFB2-sensitive aptamers to a colloidal solution of gold nanoparticles (AuNPs). Subsequent addit...

    Yunxia Luan, Jiayi Chen, Gang **e, Cheng Li, Hua **, Zhihong Ma… in Microchimica Acta (2015)