Journal article
An innovative rapid method for analysis of 10 organophosphorus pesticide residues in wheat by HS-SPME-GC-FPD/MSD
Journal of AOAC International, Vol.99(2), pp.520-526
2016
Abstract
The rapid detection of pesticide residues in wheat has become a top food security priority. A solvent-free headspace solid-phase microextraction (HS-SPME) has been evaluated for rapid screening of organophosphorus pesticide (OPP) residues in wheat with high sensitivity. Individual wheat samples (1.7 g), spiked with 10 OPPs, were placed in a 4 mL sealed amber glass vial and heated at 60°C for 45 min. During this time, the OPP residues were extracted with a 50 μm/30 μm divinylbenzene (DVB)/carboxen (CAR)/plasma desorption mass spectroscopy polydimethylsiloxane (PDMS) fiber from the headspace above the sample. The fiber was then removed and injected into the GC injection port at 250°C for desorption of the extracted chemicals. The multiple residues were identified by a GC mass spectrometer detector (GC-MSD) and quantified with a GC flame photometric detector (GC-FPD). Seven spiked levels of 10 OPPs on wheat were analyzed. The GC responses for a 50 μm/30 μm DVB/CAR/PDMS fiber increased with increasing spiking levels, yielding significant (R2 > 0.98) linear regressions. The lowest LODs of the multiple pesticide standards were evaluated under the conditions of the validation study in a range of levels from 0 (control) to 100 ng of pesticide residue per g of wheat that separated on a low-polar GC capillary column (Agilent DB-35UI). The results of the HS-SPME method were compared with the QuEChERS AOAC 2007.01 method and they showed several advantages over the latter. These included improved sensitivity, selectivity, and simplicity.
Details
- Title
- An innovative rapid method for analysis of 10 organophosphorus pesticide residues in wheat by HS-SPME-GC-FPD/MSD
- Authors/Creators
- X. Du (Author/Creator)Y.L. Ren (Author/Creator)S.J. Beckett (Author/Creator)
- Publication Details
- Journal of AOAC International, Vol.99(2), pp.520-526
- Publisher
- AOAC International
- Identifiers
- 991005540523707891
- Copyright
- © 2016 Ingenta.
- Murdoch Affiliation
- School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.60 Herbicides, Pesticides & Ground Poisoning
- 3.60.412 Solid-Phase Microextraction
- Web Of Science research areas
- Chemistry, Analytical
- Food Science & Technology
- ESI research areas
- Agricultural Sciences