title: Application of ionic-liquid-supported magnetic dispersive solid-phase microextraction for the determination of acaricides in fruit juice samples.
abstract: In this study, ionic liquid (IL) supported magnetic dispersive solid-phase microextraction was developed and a systematic investigation was conducted on imidazolium ILs for their extraction performance. This nano-based pretreatment procedure was then applied for the determination of acaricides in fruit juice samples for the first time. A feature of this technique is that the commonly laborious chemical modification of magnetic nanoparticles (MNPs) was skillfully circumvented. Because of the combination of ILs, dispersive liquid-liquid microextraction, and dispersive MNP solid-phase microextraction, the extraction efficiency can be significantly improved using commercial MNPs. Parameters of the extraction method were investigated by one-factor-at-a-time approach. The optimal experimental conditions were as follows: emulsification for 2 min by sonication with the addition of 50 μL [C6MIM][NTf2] in the dispersive liquid-liquid microextraction step and vortexing for 90 s after adding 40 mg spherical barium ferrite nanoparticles (20 nm). The desorption time was 2 min. Good linearity (0.5-500 ng/mL) and detection limits within the range of 0.05-0.53 ng/mL were achieved. The application of the proposed method was demonstrated by the analysis of real fruit juice samples, in which recoveries between 85.1 and 99.6% were obtained.
authors.affiliation: Department of Applied Chemistry, China Agricultural University, Beijing, China.
authors.forename: Jiaheng
authors.initials: J
authors.lastname: Zhang
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Yubo
authors.initials: Y
authors.lastname: Li
authors.forename: Zongyang
authors.initials: Z
authors.lastname: Li
authors.forename: Fenfen
authors.initials: F
authors.lastname: Wang
authors.forename: Qiu
authors.initials: Q
authors.lastname: Li
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Zhou
authors.forename: Runhua
authors.initials: R
authors.lastname: Lu
authors.forename: Haixiang
authors.initials: H
authors.lastname: Gao
mesh_terms: D056810:Acaricides / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D060526:Magnetic Fields; D052617:Solid Phase Microextraction
chemical_list: D056810:Acaricides; D052578:Ionic Liquids
keywords: Acaricides; Ionic liquids; Magnetic nanoparticles; Sample preparation; Ultrasound