Rapid analysis of pyrethroid insecticides in aquaculture seawater samples viamembrane-assisted solvent extraction coupled with gas chromatography-electron capture detection

Shi, Xizhi; Song, Suquan; Sun, Ailing; Liu, J. H.; Li, D. X.; Chen, J.

doi:10.1039/c1an15782e

Cited by 4 publications

(6 citation statements)

References 26 publications

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“…The results of the above studies indicated that the transport rates of the pyrethroid insecticides through MIMs were markedly higher than those through NIMs and DP membrane, and the shorter time to reach equilibrium for MI–MASE are required than those needed to MASE and NI–MASE. The reason may be ascribed that the analyte transfer across the NIMs and DP membrane is driven by the difference in concentration with no selectivity . Further, to gain better insight into the permselectivity of MIMs, the TFs for BIF, CYF, CYP, FEN, and DEL were calculated (Table ), indicating that CYP has higher permeation amount than the other four analogues through MIMs.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The injector temperature was 240 °C, and the detector temperature was set at 320 °C. The samples (1.0 μL) were injected using the split mode at a ratio of 30:1 …”

Section: Methodsmentioning

confidence: 99%

“…The samples (1.0 μL) were injected using the split mode at a ratio of 30:1. 15 Gas Chromatography−Tandem Mass Spectrometry. The quantification of pyrethroid insecticides was performed using an Agilent 7890A GC coupled to an Agilent 7000A triple− quadrupole mass spectrometer (Agilent Technologies) operated in multiple reaction monitoring mode (MRM).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Another alternative technique, namely, membrane-assisted solvent extraction (MASE) based on the diffusion of an organic compound through a nonporous membrane, which presents low solvent consumption, convenience, and potential for automation, has been successfully applied to analysis of organic compounds in samples with complex matrices. , The nonporous membrane provides a barrier for interferences in terms of permeation and transport through the membrane and realizes extraction and enrichment according to the polarity of organic compounds, simultaneously resulting in low permselectivity to specific analytes . Therefore, surface modification of the membrane by a specific functional base was applied to enhance the selectivity and mass transform capability of the membrane.…”

mentioning

confidence: 99%

“…13,14 The nonporous membrane provides a barrier for interferences in terms of permeation and transport through the membrane and realizes extraction and enrichment according to the polarity of organic compounds, simultaneously resulting in low permselectivity to specific analytes. 15 Therefore, surface modification of the membrane by a specific functional base was applied to enhance the selectivity and mass transform capability of the membrane. Molecularly imprinted polymers (MIPs) with high selectivity and excellent physicochemical characteristics could be used as a functional base donor, and the molecularly imprinted solid phase extraction (MISPE) has been successfully used for the isolation and cleanup of pyrethroid insecticides in different matrix samples.…”

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confidence: 99%

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Highly Permselective Membrane Surface Modification by Cold Plasma-Induced Grafting Polymerization of Molecularly Imprinted Polymer for Recognition of Pyrethroid Insecticides in Fish

et al. 2014

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Specific molecularly imprinted membranes (MIMs) for pyrethroid insecticides were developed and characterized for the first time in this study by cold plasma-induced grafting polymerization using methacrylic acid as a functional monomer and cypermethrin (CYP) as a template. The nonimprinted membranes (NIMs) were also synthesized using the same procedure without the template. Meanwhile, AFM, XPS, ATR-FTIR, contact angle, and permselectivity experiments were conducted to elucidate the imprinting and recognition properties of MIMs. Results demonstrated that MIMs exhibited excellent imprinting effect and high permselectivity. A molecularly imprinted-membrane-assisted solvent extraction (MI-MASE) method based on the MIMs was established. The operating conditions were optimized for group-selective extraction of the five pyrethroid insecticides. Compared with NIMs, higher extraction recoveries (83.8% to 100.6%) of the five pyrethroid insecticides by gas chromatography-electron capture detector (GC-ECD) were obtained using MIMs at three spiked levels in fish samples; the RSD values were lower than 8.3%. The limits of detection (LOD) and quantification (LOQ) defined as the concentrations at which the signal-to-noise (S/N) ratio is 3:1 and 10:1, respectively, were in the range of 0.26 to 0.42 μg/kg and 0.77 to 1.27 μg/kg, respectively. No matrix effect of the developed MI-MASE was observed by gas chromatography/tandem mass spectrometry (GC/MS/MS). These results demonstrated a highly selective, efficient, and environment-friendly MI-MASE technique for preconcentration and purification of pyrethroid insecticides from seafood, followed by GC-ECD and GC/MS/MS. The excellent applicability and potential of MI-MASE for routine monitoring of pyrethroid pesticides in food samples has also been confirmed.

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Section: Results and Discussionmentioning

confidence: 99%

“…The injector temperature was 240 °C, and the detector temperature was set at 320 °C. The samples (1.0 μL) were injected using the split mode at a ratio of 30:1 …”

Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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