Thiram is a readily synthesized, cost-effective antimicrobial agent widely used to control diseases in fruits and vegetables. Given the potential health hazards associated with thiram residues and advancements in detection methods, it is crucial to develop a rapid and sensitive technique for detecting these residues on fruit surfaces. Here, we prepared the Ag@filter paper (Ag@FP) surface-enhanced Raman scattering (SERS) substrate in a controlled manner and innovatively developed a capillarity-assisted SERS (CA-SERS) detection method. Sampling can be completed in less than 1 min by either wiping or using the CA-SERS method. Utilizing a portable Raman device, the detection limit for thiram residues on apple surfaces can reach as low as 0.005 ng/cm² with the CA-SERS detection method. Furthermore, the substrate is cost-effective, can be prepared in just 7 min, and remains stable at room temperature for up to 40 days. Additionally, we developed a cost-effective, centimeter-scale auxiliary detection device to facilitate efficient on-site detection.

中文翻译：

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使用银纳米颗粒/滤纸 SERS 基材对苹果表面的硫胺进行简单快速的毛细管辅助超痕量检测


Thiram 是一种易于合成、具有成本效益的抗菌剂，广泛用于控制水果和蔬菜中的疾病。鉴于与硫胺残留物相关的潜在健康危害和检测方法的进步，开发一种快速、灵敏的技术来检测水果表面的这些残留物至关重要。在这里，我们以受控方式制备了Ag@filter纸 （Ag@FP） 表面增强拉曼散射 （SERS） 衬底，并创新性地开发了毛细管辅助 SERS （CA-SERS） 检测方法。通过擦拭或使用 CA-SERS 方法，可以在不到 1 分钟的时间内完成采样。利用便携式拉曼设备，使用 CA-SERS 检测方法，苹果表面硫胺残留的检测限可低至 0.005 ng/cm ² 。此外，该底物具有成本效益，只需 7 分钟即可制备，并在室温下保持稳定长达 40 天。此外，我们还开发了一种经济高效的厘米级辅助检测设备，以促进高效的现场检测。