期刊
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
卷 38, 期 8, 页码 1386-1399出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2021.1933207
关键词
SERS substrate; Raman; fungicides; residues detection; fruit; nanoparticles
资金
- National Key R&D Program of China [2018YFC1603400]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515010936]
- Fundamental Research Funds for the Central Universities [D2190450]
- Contemporary International Collaborative Research Centre of Guangdong Province on Food Innovative Processing and Intelligent Control [2019A050519001]
- Common Technical Innovation Team of Guangdong Province on Preservation and Logistics of Agricultural Products [2020KJ145, 201712800026]
- China Scholarship Council
The study developed a novel SERS substrate by modifying the surface of silver-coated gold nanoparticles with thiol ligands for the rapid assessment of fungicide residues in fruit samples. The results demonstrated the substrate's high detection performance, stability, and potential application in detecting ferbam and thiabendazole residues in apple puree.
Modification of surface-enhanced Raman spectroscopy (SERS) substrates with thiol ligands is an emerging approach in enhancing the stability and sensitivity of metal substrates due to their good affinity with metals such as Au, Ag, and Cu. Thus, in the current study, 2-mercaptoethanol was used to modify the surface of silver-coated gold nanoparticles to develop a novel SERS substrate for the rapid assessment of fungicide residues in fruit samples. Results showed that the substrate could achieve the detection of ferbam and thiabendazole residues in apple puree with limits of detection of approximately 0.0042 and 0.0064 ppm, high coefficients of determination of 0.9946 and 0.9968, good recoveries ranging from 80 to 105 and 81 to 107% and relative standard deviations of 3.5-7.5 and 3.8-7.9 %, respectively. Therefore, the substrate developed could potentially be utilised to assess other toxic agrochemicals in future.
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