Application of Fe3O4/RGO Nanocomposite as a Sorbent of Pesticides

作者：Tavakoli Mehdi; Hajimahmoodi Mannan^*; Shemirani Farzaneh; Dezfuli Amin Shiralizadeh; Khanavi Mahnaz

来源：Chromatographia, 2017, 80(9): 1423-1432.

DOI：10.1007/s10337-017-3361-8

• GC-MS
• Solid phase extraction
• Graphene oxide
• Magnetic nanoparticles
• Pesticides

In the present study, to extract the residue of seven pesticides (diazinon, chlorpyrifos, ethion, permethrine, cypermethrin, fenvalerate RR and fenvalerate SS) from raisin samples, reduced graphene oxide-Fe3O4 magnetic nanocomposite is applied as an adsorbent and then the preconcentrated pesticides were determined by GC-MS. The application of high adsorption capacity magnetic graphene oxide sheets in pesticides solid phase extraction, provides a fast and easy procedure without filtration or centrifugation. The extraction conditions were optimized by analyzing spiked raisin samples (80 ng mL(-1)). The parameters affecting the performance of the extraction such as nanoparticles concentration, extraction time, solution pH and desorption conditions were investigated using a univariate optimization process. The maximum adsorption was observed within 15 min at pH 7-8 using 0.4 mg mL(-1) of adsorbent with the sample ionic strength of 0.02 M NaCl. Limits of detection and quantification were about 14 and 40 A mu g kg(-1), respectively, for all of pesticides. The validated method was successfully applied for the determination of pesticides in raisin samples.

• 出版日期2017-9