Key Laboratory of Agro-product Quality and Safety , Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences , Beijing 100081 , China.
J Agric Food Chem. 2020 Feb 12;68(6):1507-1513. doi: 10.1021/acs.jafc.9b03678. Epub 2019 Oct 28.
Tristyrylphenol ethoxylates (TSPEOs) have been increasingly used in pesticide formulations as inert ingredients in China, but little information exists on the dissipation behavior of TSPEOs in foodstuffs. In this work, a rapid method for measuring TSPEO homologs in lettuce using QuEChERS and HPLC-MS/MS was established. This method was used to study the dissipation and distribution profiles of TSPEOs in lettuce. TSPEO homologs degraded rapidly under greenhouse and field conditions, with half-lives of 2.18-5.39 and 1.82-5.52 days, respectively. TSPEO ( = 6-9) were relatively persistent in the field. The distribution profiles showed an obvious difference between the two conditions. TSPEO ( = 14-18) degraded to shorter-chain TSPEOs with time, and a two-peak (TSP16EO and TSP10EO) homolog distribution profile occurred between 7 and 14 days of treatment under greenhouse conditions. This work improves the understanding of the dissipation behavior of TSPEO homologs in lettuce.
三苯乙烯基苯酚乙氧基化物（TSPEOs）作为惰性成分在中国越来越多地被用于农药制剂中，但关于 TSPEOs 在食品中的消解行为的信息很少。在这项工作中，建立了一种使用 QuEChERS 和高效液相色谱-串联质谱法快速测定生菜中 TSPEO 同系物的方法。该方法用于研究 TSPEOs 在生菜中的消解和分布情况。TSPEO 同系物在温室和田间条件下迅速降解，半衰期分别为 2.18-5.39 和 1.82-5.52 天。TSPEO（=6-9）在田间相对持久。分布情况在两种条件下存在明显差异。TSPEO（=14-18）随着时间的推移降解为短链 TSPEOs，在温室条件下处理 7-14 天期间出现了双峰（TSP16EO 和 TSP10EO）同系物分布谱。这项工作提高了对 TSPEO 同系物在生菜中消解行为的理解。
