Simultaneous determination of 45 pesticides in fruit and vegetable using an improved QuEChERS method and on-line gel permeation chromatography–gas chromatography/mass spectrometer

Analysis of pesticide residues in tobacco with online size exclusion chromatography with gas chromatography and tandem mass spectrometry

“…The SEC was equipped with an automatic sample injector (SIL‐20A), a Shodex CLNpak EV‐200AC SEC chromatographic column (2 mm (id) × 15 mm (L)), two pumps (LC–20AD), a column oven (CTO‐20A), an UV detector (SPD‐20A), two flow channel selection valves A and B (FCV‐12AH), a 200 μL sample loop and a data processor (CBM‐20A). The schematic diagram and operational principle of online SEC device has been reported in details . The SEC system was coupled with GC–MS/MS.…”

“…SEC has the capability of removing interferences such as pigment, polymer, and alkaloid from matrix . An online SEC–GC–MS/MS, in which SEC is added to GC–MS/MS online, is a fast, efficient, and labor‐saving system for screening residual pesticides in foods in comparison with the offline operation, which consumes more time and solvent .…”

Magnetic graphene as modified quick, easy, cheap, effective, rugged and safe adsorbent for the determination of organochlorine pesticide residues in tobacco

“…Through calculation and investigation, the cost in clean-up step for one sample were $2.24 and less than $0.64 for traditional QuEChERS method [39] and the proposed QuEChERS method, respectively. What's more, the centrifugation or filtration step which was used in traditional QuEChERS method containing GCB or C18 was omitted in the proposed method [18,19,21,22,36], so it has the advantages of simplicity and rapidity. In whole, compared to other methods for the determination of OCPs in tobacco [22], water [29,[32][33][34][35], fruit and vegetable samples [36], the method in this study has the advantages of simple to operate, low cost and high clean-up ability.…”

“…By coupling with on-line gel permeation chromatography-gas chromatography/tandem mass spectrometry (on-line GPC-GC-MS 2 ), a method for the determination of 26 OCPs residues in tobacco was proposed. Because GPC clean-up system is connected to a GC-MS 2 system online, so it provides a fast and labor-saving analytical system for screening pesticide residues [36,37]. In addition, the using of magnetic graphene significantly simplifies the sample preparation procedure.…”

Determination of Polycyclic Aromatic Hydrocarbons in Camellia Oil by Gel Permeation and High-Performance Liquid Chromatography

“…Many approaches for the isolation of polycyclic aromatic hydrocarbons from oil have been reported, including liquid-liquid partitioning (Cabras et al 1997;Lentza-Rizos, Avramides, and Cherasco 2001), solid phase extraction (Ferrer et al 2005), and gel permeation chromatography (Fromberg, Højgård, and Duedahl-Olesen 2007). Gel permeation chromatography is a reliable and advantageous method due to its high selectivity and capability to isolate analytes in a single injection with fully automated systems, and has been widely reported for polycyclic aromatic hydrocarbons in food (Lu et al 2012). Similarly, a number of chromatographic methods have been developed for the quantification of polycyclic aromatic hydrocarbons in food (Gratz et al 2000;Moret and Conte 2000).…”