Polyamidoamine Dendrimer Modified Silica Nanoparticles: A Promising Sorbent for Benzoylurea Insecticides Detection in Tea Infusions

• 全文链接

聚酰胺胺树状大分子修饰二氧化硅纳米颗粒：一种有前景的用于检测茶浸液中苯甲酰脲类杀虫剂的吸附剂

关键词：

来源：

Journal of the Brazilian Chemical Society 期刊

全文链接：

//agri.nais.net.cn/topic/downloadFile/3a7795d7-b32e-4dc1-a8d2-6e4956bf1821

来源地址：

https://www.scielo.br/j/jbchs/a/bF8rfzmPgjWWFd74jkQwTGm/#:~:text=This%20research%20aims%20to%20develop%20a%20precise%20and,green%20tea%2C%20black%20tea%2C%20and%20oolong%20tea%20infusions.

资源所属：

茶学研究专题

类型：

学术文献

语种：

英语

原文发布日期：

2024-08-24

摘要：

This research aims to develop a precise and efficient dispersive solid-phase microextraction (DSPE) technique using third-generation polyamidoamine (PAMAM) dendrimer-grafted nanoparticles to quantify benzoylurea pesticides in green tea, black tea, and oolong tea infusions. The extraction efficiency is optimized through single-factor adjustments of key parameters, including adsorbent quantity (5-20 mg), adsorption duration (5-20 min), desorbent identity (methanol, acetonitrile), volume (100-600 μL), sodium chloride concentration (0-10%, m/v), and sample solution pH (3-8). The optimized method demonstrates linearity in the range of 2-500 μg L-1, with limits of detection (LODs) ranging from 0.6-1.5 μg L-1 and limits of quantification (LOQs) from 2.0 5.0 μg L-1. Recovery rates of 81.2-96.0% are achieved, with intra-day relative standard deviations (RSDs) of 1.4-2.8% and inter-day relative standard deviations of 2.0-3.9%, indicating high accuracy and repeatability. The successful application of detecting residues in commercial tea samples underscores the strong potential of the technique to determine benzoylurea analyte levels.