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- W2018967386 abstract "In this study, a polypropylene sieve with porous network structure was coated with polydimethylsiloxane (PDMS) and used as extraction phase. Based on the PDMS-sieve, a rapid, simple and sensitive sorptive extraction method was established for analysis of five pyrethroid residues in tea samples. In the method, pyrethroids in a stirred solution were extracted on a PDMS-sieve, the analytes loaded on the sieve were then ultrasonically desorbed in ethyl acetate and analyzed by gas chromatography-mass spectrometer (GC-MS) with selected ion monitoring mode (SIM). The proposed method was optimized and validated, the matrix-matched calibration curves were performed at six concentration levels and good linear correlations (r) were obtained (r ≥ 0.9907) within the range of 0.001–0.1 μg mL−1. The detection limits (LODs) of five pesticides ranged from 0.8 ng g−1 to 19.6 ng g−1. Good repeatability was obtained with the inter- and intra-day relative standard deviation (RSDs) values lower than 10%. The method has been applied successfully to the determination of pyrethroids in six tea samples, and satisfactory recoveries ranging from 82% to 111% were obtained. The results indicated that the proposed method is suitable for trace analysis of pesticides residues in tea samples." @default.
- W2018967386 created "2016-06-24" @default.
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- W2018967386 date "2012-01-01" @default.
- W2018967386 modified "2023-10-17" @default.
- W2018967386 title "New sorptive extraction method based on polydimethylsiloxane sieve combined with GC-MS for determination of pyrethroid residues in tea" @default.
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- W2018967386 doi "https://doi.org/10.1039/c2ay25918d" @default.
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