Journal
JOURNAL OF SEPARATION SCIENCE
Volume 34, Issue 23, Pages 3418-3425Publisher
WILEY PERIODICALS, INC
DOI: 10.1002/jssc.201100682
Keywords
HPLC; DAD; Mebendazole; Monolithic material; Oxfendazole; Poly(vinylphthalimide-co-N; N'-methylenebisacrylamide); Stir bar sorptive extraction
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Funding
- National Nature Science Foundation of China [21077085]
- Nature Science Foundation of Fujian Province of China [2010J01047]
- Fundamental Research Funds for the Central Universities [CXB2011037]
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In this study, a new stir bar sorptive extraction (SBSE) coating based on poly(vinylphthalimide-co-N,N'-methylenebisacrylamide) monolith (SBSE-VPMB) was prepared. The influences of the contents of monomer in polymerization mixture and the percentage of porogen solvent on the extraction performance were investigated thoroughly. Several characteristic techniques, such as elemental analysis, scanning electron microscopy, mercury intrusion porosimetry and infrared spectroscopy, were used to characterize the monolithic material. The analysis of oxfendazole (OFZ) and mebendazole (MBZ) in milk and honey samples by the combination of SBSE with HPLC with diode array detection was selected as paradigms for the practical evaluation of the new coating. Under the optimized extraction conditions, the limits of detection (S/N=3) for OFZ and MBZ were 0.230.60 mu g/L in milk and 0.241.08 mu g/L in honey, respectively. The method also showed good linearity, repeatability, high feasibility and acceptable recoveries for real samples. At the same time, the extraction performance and the distribution coefficients (KVPMB/W) of OFZ and MBZ on SBSE-VPMB were compared with other SBSEs based on porous monoliths and commercial SBSE.
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