期刊
JOURNAL OF SEPARATION SCIENCE
卷 32, 期 1, 页码 147-153出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200800486
关键词
Honey; Organophosphorus pesticides Polydimethylsiloxane/poly(vinylalcohol); Sol-gel; LVI-GC-FPD
资金
- Science Fund for Creative Research Groups of NSFC [20621502]
- National Nature Science Foundation of China [20775057]
- MOE of China [NCEH-04-0658]
A PDMS/poly(vinylalcohol) (PDMS/PVA) film prepared through a sol-gel process was coated on stir bars for sorptive extraction, followed by liquid desorption and large volume injection-GC-flame photometric detector (LVI-GC-FPD) for the determination of five organophosphorus pesticides (OPPs) (phorate, fenitrothion, malathion, parathion, and quinalphos) in honey. The preparation reproducibility of PDMS/PVA-coated stir bar ranged from 4.3 to 13.4% (n = 4) in one batch, and from 6.0 to 12.6% (n = 4) in batch to batch. And one prepared stir bar can be used for more than 50 times without apparent coating loss. The significant parameters affecting stir bar sorptive extraction (SBSE) were investigated and optimized. The LODs for five OPPs ranged from 0.013 (parathion) to 0.081 mu g/L (phorate) with the RSDs ranging from 5.3 to 14.2% (c = 1 mu g/L, n = 6). The proposed method was successfully applied to the analysis of five OPPs in honey.
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