One-step homogeneous micro-orifice resistance immunoassay for detection of chlorpyrifos in orange samples

文献类型： 外文期刊

第一作者： Ren, Liangqiong

作者： Ren, Liangqiong;Hong, Feng;Wang, Zhilong;Chen, Yiping;Feng, Wanxian;Huang, Hanying;Chen, Yiping;Ren, Liangqiong;Feng, Wanxian;Wang, Zhilong;Chen, Yiping;Wang, Zhilong;Chen, Yiping

作者机构：

关键词： One-step detection; Micro-orifice resistance immunoassay; Polystyrene microsphere probe; Chlorpyrifos detection

期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）

ISSN： 0308-8146

年卷期： 2022 年 386 卷

页码：

收录情况： SCI

摘要： In this work, a one-step homogeneous micro-orifice resistance immunoassay has been proposed for chlorpyrifos detection by integrating functionalized polystyrene (PS) microsphere probes with particle counting technology. The particle counter is highly sensitive and accurate for detecting the state of PS microspheres, where the particles of different states exhibit significant differences in resistance. The state of the functionalized PS mi-crospheres is altered from dispersed to aggregated during the antigen-antibody recognition. Based on the degree of aggregation of the functionalized PS microsphere probes, chlorpyrifos can be quantitatively detected through the competitive immune response between PS antibodies and PS complete antigens. This one-step homogeneous micro-orifice resistance immunoassay simplified the procedures and greatly increased the sensitivity of detec-tion, which has been successfully applied to detect chlorpyrifos in orange samples within 0.5 h, with the detection limit of 0.058 ng/mL.

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