College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China.
School of Pharmacy, Nantong University, Nantong 226001, Jiangsu, China.
J Chromatogr A. 2024 Dec 6;1738:465500. doi: 10.1016/j.chroma.2024.465500. Epub 2024 Nov 2.
An efficient PCN-224/graphene aerogel modified silica (PCN-224/GA@Sil)-based extraction method was established for monitoring the degradation process of two organophosphorus pesticides (OPPs) in juice. PCN-224/GA@Sil exhibited higher surface area (307.35 m g) than graphene oxide modified silica (254.09 m g). The introduction of PCN-224 endowed the sorbent with excellent adsorption specificity towards OPPs due to the ZrˑˑˑS/O coordination bond. PCN-224 exhibited relatively higher theoretical adsorption energies of PCN-224 towards fenitrothion and fenthion were 0.68 eV and -0.31 eV. The established PCN-224/GA@Sil-HPLC method showed the linearity of 0.2-500 μg L for analytes. The matrix effects in juice were 9.68 % and 3.61 % for fenitrothion and fenthion. Finally, it was used for the sample pretreatment of juice preventing interference from food matrices to monitor the degradation of two OPPs. A combination method of ultrasound and xenon lamp was adopted to degrade fenitrothion and fenthion displaying the synergistic effect (SE=2.12, 1.39).
建立了一种基于 PCN-224/石墨烯气凝胶修饰的二氧化硅（PCN-224/GA@Sil）的高效萃取方法，用于监测果汁中两种有机磷农药（OPPs）的降解过程。PCN-224/GA@Sil 的比表面积（307.35 m g）高于氧化石墨烯修饰的二氧化硅（254.09 m g）。PCN-224 的引入由于 ZrˑˑˑS/O 配位键，使吸附剂对 OPPs 具有优异的吸附特异性。PCN-224 对fenitrothion 和 fenthion 的理论吸附能分别为 0.68 eV 和-0.31 eV，相对较高。建立的 PCN-224/GA@Sil-HPLC 方法对分析物的线性范围为 0.2-500 μg L。fenitrothion 和 fenthion 在果汁中的基质效应分别为 9.68 %和 3.61 %。最后，该方法用于果汁的样品预处理，以防止食品基质的干扰，监测两种 OPPs 的降解情况。采用超声波和氙灯的组合方法降解 fenitrothion 和 fenthion，显示出协同效应（SE=2.12，1.39）。
