检出限
聚二甲基硅氧烷
福瑞姆
残留物(化学)
纳米技术
基质(水族馆)
材料科学
色谱法
农药残留
分析化学(期刊)
化学
杀虫剂
有机化学
生物
海洋学
农学
地质学
作者
Yusheng Zhang,Yong Wang,Anran Liu,Songqin Liu
标识
DOI:10.1016/j.saa.2023.122721
摘要
We developed a novel fabrication of flexible surface-enhanced Raman scattering (SERS) substrate to perform selective and sensitive determination of thiram residue in fruits and juices. Au nanostars (Au NSs) with multi-branching structure were self-assembled on aminated Polydimethylsiloxane (PDMS) slides by electrostatic interaction. By measuring the Thiram's characteristic peak intensity at 1371 cm-1, the SERS method could distinguish Thiram from other pesticide residues. A good linear relationship between the peak intensity at 1371 cm-1 and thiram's concentration was established at the range from 0.01 ppm to 100 ppm and the Limit of detection is 0.0048 ppm. We directly used this SERS substrate to detect Thiram in apple juice. By standard addition method, recoveries varied in the range of 97.05% to 106.00% and the RSD were from 3.26% to 9.35%. The SERS substrate exhibited a good sensitivity, stability and selectively for the detection of Thiram in food samples, which can be spread as a common method for the detection of pesticides in food samples.
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