title: Application of graphene for the SPE clean-up of organophosphorus pesticides residues from apple juices.
abstract: In this paper, an effective graphene-based SPE clean-up procedure coupled with GC-MS was developed for the determination of organophosphorus pesticide residues in apple juices. The apple juice samples were diluted with water and could be loaded onto the cartridge directly. Several parameters affecting the extraction efficiency were investigated, including the type of elution, washing solution, and sample pH. Under the optimized conditions, excellent limits of quantitation for the target analytes were found to be 0.15-1.18 ng/mL, and the average recoveries of the analytes at two spiked levels for real-sample analysis ranged from 69.8 to 106.2% with RSDs less than 7.3%. Furthermore, the graphene-based cartridges exhibited superior reusability for juice sample analysis. The proposed method is sensitive, simple, and cost saving, and provides a detection platform for the monitoring of pesticide residues.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Han
authors.forename: Zonghua
authors.initials: Z
authors.lastname: Wang
authors.forename: Jianfei
authors.initials: J
authors.lastname: Xia
authors.forename: Xiaoqiong
authors.initials: X
authors.lastname: Zhang
authors.forename: Hongwu
authors.initials: H
authors.lastname: Wang
authors.forename: Mingyu
authors.initials: M
authors.lastname: Ding
mesh_terms: D001628:Beverages / Q000032:analysis*; D005638:Fruit / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006108:Graphite / Q000737:chemistry; D027845:Malus / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry / Q000302:isolation & purification; D010573:Pesticide Residues / Q000737:chemistry / Q000302:isolation & purification*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
chemical_list: D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D006108:Graphite