福瑞姆
梨
杀菌剂
胶体金
色谱法
检出限
污染
化学
银纳米粒子
纳米颗粒
核化学
材料科学
纳米技术
园艺
生物
生态学
作者
Nisar Hussain,Hongbin Pu,Da‐Wen Sun
出处
期刊:Food Chemistry
[Elsevier]
日期:2021-07-01
卷期号:350: 129025-129025
被引量:68
标识
DOI:10.1016/j.foodchem.2021.129025
摘要
Silver-coated gold nanoparticles ([email protected]) were optimized with different gold (Au) core sizes and modified surface with mercaptooctane (MCO) to determine fungicide residues in pear fruit extracts. The developed MCO/[email protected] with a gold core size of 28 nm and silver shell thickness of 6 nm exhibited high sensitivity and significant enhancement of Raman scattering in detecting tricyclazole (TCZ) and thiram fungicides in standard and pear fruit samples. The detection limits for TCZ and thiram in the pear fruit extracts were 0.005 and 0.003 ppm with coefficients of determination of (R2) of 0.9984 and 0.9971, percent recovery ranging from 82.7 to 107.4% and 80.7 to 109.8%, and relative standard deviation (RSD) of 1.5 to 7.9% and 3.7 to 9.5%, respectively. Results showed that this easily prepared method could be employed as SERS active platforms for the rapid assessment of trace contaminants of agrochemicals in agriculture production.
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