Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing 100176, China; School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing 100176, China.
Food Chem. 2022 Oct 30;392:133190. doi: 10.1016/j.foodchem.2022.133190. Epub 2022 May 10.
A new method that utilizes a magnetic covalent organic framework (FeO@BTA-TAPM) as a selective solid-phase extraction adsorbent has been developed for the simultaneous preconcentration of trace eleven kinds of strobilurin fungicides (SFs) in foods combined with ultra-high performance liquid chromatography-tandem mass spectrometry. The preconcentration conditions were optimized, including the adsorbent amount, extraction time, pH value, shaking time, elution solvent, desorption time and the interference ions. The maximum adsorption capacity of the adsorbent was ranging from 42.84 mg g to 54.18 mg g for eleven SFs. The low limits of detection were 0.003-0.072 μg kg. The recoveries of eleven SFs spiked at levels of 0.25-1000 μg kg ranged from 80.2% to 109.3%, and the relative standard deviations were <6.8% (n = 3). The utility of the adsorbent was demonstrated to determine traces SFs in four different samples.
一种新的方法，利用磁性共价有机框架（FeO@BTA-TAPM）作为一种选择性固相萃取吸附剂，结合超高效液相色谱-串联质谱法，用于同时预浓缩食品中痕量的 11 种烯酰吗啉类杀菌剂（SFs）。优化了预浓缩条件，包括吸附剂用量、萃取时间、pH 值、振荡时间、洗脱溶剂、解吸时间和干扰离子。吸附剂对 11 种 SFs 的最大吸附容量在 42.84-54.18mg/g 之间。检测限低至 0.003-0.072μg/kg。11 种 SFs 在 0.25-1000μg/kg 水平下的加标回收率为 80.2%-109.3%，相对标准偏差均小于 6.8%（n=3）。该吸附剂的实用性已在四种不同的样品中用于检测痕量 SFs。
