A polyurethane-based thin film for solid phase microextraction of pyrethroid insecticides

Mikrochimica Acta
Xianbin ZhuJiaying Xue

Abstract

This work introduces polyurethane (PU) as an efficient and economic sorbent for thin film solid phase microextraction of pyrethroid insecticides, specifically of bifenthrin, fenpropathrin, lambda-cyhalothrin, permethrin, cypermethrin, flucythrinate, fenvalerate and deltamethrin. The PU film is immersed into chrysanthemum tea under ultrasonication for the adsorption of the analytes, and the analytes are desorbed by a mixture of hexane and ethyl acetate and then quantified by gas chromatography with electron capture detection. The film type, adsorption temperature, extraction time, sample condition, and desorption procedure were optimized. The adsorption capacity and robustness of the PU film is found to be excellent for analysis of pyrethroids in chrysanthemum tea. The limits of detection and method limits of detection range from 0.05-0.5 μg L-1 and 0.0003-0.003 μg L-1, respectively. The relative recoveries from spiked samples are between 84.5 and 104.1%, and enrichment factors up to 188. The method was validated through blind split analyses of chrysanthemum tea infusion and ready-to-drink samples with liquid-liquid extraction. Good agreement between the two approaches shows the method to have an accuracy that is similar to that...Continue Reading

References

Mar 8, 2003·Analytical Chemistry·Inge BruheimJanusz Pawliszyn
Sep 17, 2009·Journal of Agricultural and Food Chemistry·Michelle L Hladik, Kathryn M Kuivila
Dec 10, 2013·Analytical Chemistry·Ruifen Jiang, Janusz Pawliszyn
Jan 11, 2014·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Jiaying XueJing Zhan
Dec 3, 2014·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Jiaying XueHuichen Li
May 13, 2015·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Hongtao LiuTiangang Luan
May 18, 2016·Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences·Feifei HuoLei Li

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