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<p> A&#xa0;portable kit was developed for on-site high-throughput detection of methyl parathion&#xa0;(MPT) in vegetables by integrating solid-phase microextraction and SERS technology. This portable kit consists of a 96-well plate coated with a copper foil modified by silver nanocrystals, which was fabricated by a galvanic displacement method. The 96-well plate allows multiple samples to be pretreated simultaneously, with each well featuring small pits that isolate individual samples, effectively preventing cross-contamination. Furthermore, the SERS substrate allows the enrichment of MPT on its surface, enhancing detection sensitivity and specificity. The method detection limits calculated from the characteristic peak of MPT is 0.27&#xa0;ng/cm<sup>2</sup> (<i>S</i>/<i>N</i> = 3). MPT on spinach, green pepper, and tomato surfaces were directly determined rapidly and the sensitivities were 1.42&#xa0;ng/cm<sup>2</sup>, 0.84&#xa0;ng/cm<sup>2</sup>, and 0.87&#xa0;ng/cm<sup>2</sup>, respectively. The versatility and reliability of this approach underscore its potential for routine pesticide residue screening. Looking ahead, further optimization of this platform could extend its applicability to a broader spectrum of organophosphorus pesticides, bolstering food safety monitoring and reducing potential health risks.</p>

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A portable kit for high-throughput determination of methyl parathion on vegetable surface by integrating solid-phase microextraction and surface-enhanced Raman spectroscopy

  • 期刊论文

  • 发表日期：

    2025年6月20日

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  • Xiao Meng,
  • Lingfei Liu,
  • Haitong Wang,
  • Mengping Zhang,
  • Wei Zou,
  • Hongmin Wu,
  • Wenwen Chen,
  • Nianlu Li

摘要

A portable kit was developed for on-site high-throughput detection of methyl parathion (MPT) in vegetables by integrating solid-phase microextraction and SERS technology. This portable kit consists of a 96-well plate coated with a copper foil modified by silver nanocrystals, which was fabricated by a galvanic displacement method. The 96-well plate allows multiple samples to be pretreated simultaneously, with each well featuring small pits that isolate individual samples, effectively preventing cross-contamination. Furthermore, the SERS substrate allows the enrichment of MPT on its surface, enhancing detection sensitivity and specificity. The method detection limits calculated from the characteristic peak of MPT is 0.27 ng/cm2 (S/N = 3). MPT on spinach, green pepper, and tomato surfaces were directly determined rapidly and the sensitivities were 1.42 ng/cm2, 0.84 ng/cm2, and 0.87 ng/cm2, respectively. The versatility and reliability of this approach underscore its potential for routine pesticide residue screening. Looking ahead, further optimization of this platform could extend its applicability to a broader spectrum of organophosphorus pesticides, bolstering food safety monitoring and reducing potential health risks.