title: Rapid analysis of pyrethroid insecticides in aquaculture seawater samples via membrane-assisted solvent extraction coupled with gas chromatography-electron capture detection.
abstract: A simple, efficient, and environmentally friendly membrane-assisted solvent extraction (MASE) method for the extraction and preconcentration of six pyrethroid insecticides from aquaculture seawater samples followed by gas chromatography-electron capture detection (GC-ECD) was successfully proposed. The operating conditions for MASE, such as the extraction solvent, solvent volume, NaCl concentration, stirring rate, extraction time, and temperature, were optimized. Compared to conventional Florisil-solid phase extraction (SPE), higher extraction recoveries (85.9% to 105.9%) of three spiked levels of the six pyrethroid pesticides in aquaculture seawater were obtained using MASE, and the RSD values were lower than 7.9%. The limits of detection (LOD, signal-to-noise ratio (S/N)=3) and quantification (LOQ, S/N = 10) were in the range of 0.037-0.166 and 0.12-0.55 μg L(-1), respectively. The results demonstrate the excellent applicability of the MASE method in analyzing the six pyrethroid pesticides in aqueous samples. The proposed method exhibited a high potential for routine monitoring analysis of pyrethroid insecticides in seawater samples.
authors: Faculty of Life Science and Biotechnology, Key Laboratory of Applied Technology of Marine Biology, Ministry of Education, Ningbo University, 818 Fenghua Road, Ningbo, 315211, P.R. China. sxzsal78@yahoo.com.cn
authors: X Z
authors: XZ
authors: Shi
authors: S Q
authors: SQ
authors: Song
authors: A L
authors: AL
authors: Sun
authors: J H
authors: JH
authors: Liu
authors: D X
authors: DX
authors: Li
authors: J
authors: J
authors: Chen
mesh_terms: D017756:Aquaculture; D002849:Chromatography, Gas; D007306:Insecticides / Q000032:analysis*; D011722:Pyrethrins / Q000032:analysis*; D012623:Seawater / Q000032:analysis*; D059629:Signal-To-Noise Ratio; D052616:Solid Phase Extraction; D012997:Solvents / Q000737:chemistry*
chemical_list: D007306:Insecticides; D011722:Pyrethrins; D012997:Solvents