Journal
ANALYTICA CHIMICA ACTA
Volume 860, Issue -, Pages 29-36Publisher
ELSEVIER
DOI: 10.1016/j.aca.2014.12.047
Keywords
Multiple monolithic fiber solid-phase microextraction (MMF-SPME); Monolith; Sorbent; Benzoylurea insecticide; High performance liquid chromatography
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Funding
- National Natural Science Foundation of China [21377105]
- Fundamental Research Funds for the Central Universities [20720140510]
- New Century Excellent Talents in Fujian Province University
- Fundamental Innovation Research Funds for postgraduates in Xiamen University [201412G014]
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In present study, a convenient, sensitive and environmentally friendly method for the determination of five benzoylurea insecticides (BUs) in water and juice samples was developed. To extract trace benzoylurea insecticides effectively, poly(methacrylic acid-co-ethylene dimethacrylate) monolith was prepared and used as the sorbent of multiple monolithic fiber solid-phase microextraction (MMF-SPME). The influences of preparation conditions of monolith and extraction parameters of MMF-SPME on BUs were studied thoroughly. Under the optimized conditions, the combination of MMF-SPME with high performance liquid chromatography-diode array detection (MMF-SPME-HPLC-DAD) showed expected analytical performance for target analytes. The limits of detection (S/N = 3) of the developed method were 0.026-0.075 mu gL(-1) in water and 0.053-0.29 mu gL(-1) in juice samples. Good linearity was obtained for analytes with the correlation coefficients (R-2) above 0.99. Satisfactory repeatability and reproducibility was achieved, with relative standard deviations (RSD) of both less than 10%. Finally, the established MMF-SPME-HPLC-DAD method was successfully applied for the determination of BUs residues in juice and environmental water samples. Recoveries obtained for the determination of BUs in spiking samples ranged from 65.1% to 118%, with RSD below 10% in all cases. (C) 2014 Elsevier B.V. All rights reserved.
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