Abstract
A novel and portable detection platform for procymidone (PRM) was developed by combining simple sample pretreatment, lateral flow test strips based on multi-branched gold nanoparticle (LFTS-MBGNP), and a smartphone. Based on the large surface area of MBGNPs, rapid detection of PRM was realized by simple naked eye observation. By utilizing a smartphone as a portable signal analyzer, ultrasensitive quantitative detection of PRM in red wine was realized with the limits of detection (LOD) of 1.60ng/mL, which was 3000 times lower than the US limit (5ppm). Moreover, rapid detection of four kinds of fruits and vegetables was achieved within 10min, with LODs of 4.34ng/g, 6.93ng/g, 8.99ng/g, and 5.03ng/g, respectively, which could meet the PRM limit of the European Union (10ng/g). Integrating the optimized QuEChERS pretreatment method, the developed platform realized a simple and sensitive on-site detection of PRM pesticide in foods and red wine within 45min. This platform provides a useful tool and new idea for rapid screening and detection of pesticide residues in food.
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