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1.华南农业大学 食品学院 广东省食品质量安全重点实验室,广东 广州 510642
2.广州市食品检验所, 广东 广州 511410
沈玉栋,博士,教授,研究方向:食品安全,E-mail:shenyudong@scau.edu.cn
收稿日期:2025-03-12,
修回日期:2025-04-21,
纸质出版日期:2025-09-15
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张咏仪,梁颖琳,罗鼎峰,赵金利,朱亮宇,陈浩宇,沈玉栋.胶体金免疫层析法快速检测果蔬中烯酰吗啉和氟吗啉[J].分析测试学报,2025,44(09):1985-1993.
ZHANG Yong-yi,LIANG Ying-lin,LUO Ding-feng,ZHAO Jin-li,ZHU Liang-yu,CHEN Hao-yu,SHEN Yu-dong.Colloidal Gold Immunochromatography for Rapid Detection of Dimethomorph and Flumorph in Fruits and Vegetables[J].Journal of Instrumental Analysis,2025,44(09):1985-1993.
张咏仪,梁颖琳,罗鼎峰,赵金利,朱亮宇,陈浩宇,沈玉栋.胶体金免疫层析法快速检测果蔬中烯酰吗啉和氟吗啉[J].分析测试学报,2025,44(09):1985-1993. DOI: 10.12452/j.fxcsxb.250312185.
ZHANG Yong-yi,LIANG Ying-lin,LUO Ding-feng,ZHAO Jin-li,ZHU Liang-yu,CHEN Hao-yu,SHEN Yu-dong.Colloidal Gold Immunochromatography for Rapid Detection of Dimethomorph and Flumorph in Fruits and Vegetables[J].Journal of Instrumental Analysis,2025,44(09):1985-1993. DOI: 10.12452/j.fxcsxb.250312185.
该文将同时识别烯酰吗啉和氟吗啉的单克隆抗体与胶体金偶联作为识别元件,利用金纳米粒子在检测区域的富集作为检测信号,建立了一种同时定性或定量检测烯酰吗啉和氟吗啉的胶体金免疫层析方法。结果表明,在最佳工作条件下,该方法对果蔬样品中烯酰吗啉的定量检出限为0.50~0.59 ng/g,检测范围为0.5~10 ng/g,裸眼消线值为4 ng/g;氟吗啉的定量检出限为0.63~1.06 ng/g,检测范围为0.50~10 ng/g,裸眼消线值为8 ng/g。此外,两种样品的平均加标回收率为75.0%~118%,与高效液相色谱-串联质谱法检测结果相关性良好(
r
2
=0.97)。所建立的方法对其他功能类似物的交叉率小于0.1%,特异性良好,且在10 min内可以准确完成目标分析物的定量检测,可用于大量果蔬样品中烯酰吗啉和氟吗啉的快速筛查。
Due to their extensive use in the prevention and treatment of diseases in crops caused by the genera peronosporales and phytophthora,dimethomorph and fluopicolide have high detection rates in fruits and vegetables,posing potential risks to human health and environmental safety. Therefore,establishing a rapid,accurate,and visualization-compatible on-site detection method is crucial. In this study,we successfully developed a colloidal gold immunochromatographic assay(GICA) by conjugating broad-spectrum monoclonal antibodies with colloidal gold as recognition elements,and utilizing the aggregation of gold nanoparticles in the detection areas as the visual signal readout. The GICA achieved simultaneous qualitative and quantitative detection of dimethomorph and flumorph. The results indicate that under optimal conditions,the quantitative detection limit was 0.50 to 0.59 ng/g for dimethomorph in fruit and vegetable samples,with a detection range was 0.50 to 10 ng/g and a naked-eye cutoff value was 4 ng/g. For flumorph,the quantitative detection limit was 0.63 to 1.06 ng/g,and the detection range was 0.50 to 10 ng/g,and the naked-eye cutoff value was 8 ng/g. Additionally,the average spiked recovery rate for both samples was between 75.0% and 118%,which is consistent with the results obtained by HPLC-MS/MS(
r
2
=0.97). The method exhibits excellent specificity with a cross-reactivity rate of less than 0.1% for other functionally similar substances,and it can accurately complete the qualitative or quantitative detection of the target analytes within 10 minutes,making it suitable for rapid screening of dimethomorph and flumorph in a large number of fruit and vegetable samples.
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