Metal Organic Framework-Molecularly Imprinted Polymer as Adsorbent in Matrix Solid Phase Dispersion for Pyrethroids Resi
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Metal Organic Framework-Molecularly Imprinted Polymer as Adsorbent in Matrix Solid Phase Dispersion for Pyrethroids Residue Extraction from Wheat Ting Liang 1 & Shangshu Wang 1 & Ligang Chen 1 & Na Niu 1 Received: 29 May 2018 / Accepted: 3 September 2018 # Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Metal organic frameworks-molecular imprinting polymers (MOFs-MIPs) were applied as dispersants of matrix solid phase dispersion (MSPD) followed by gas chromatography-tandem mass spectrometry (GC-MS/MS) to selectively analyze pyrethroids in wheat. MOFs-MIPs characterized by a series of instrumental techniques and the adsorption properties researched by isothermal, kinetics, thermodynamics, and selective binding experiments. The results revealed that the MOFs-MIPs had a larger adsorption capacity (474.56 mg g−1) and fast adsorption time (20 min). What is more, MOFs-MIPs-MSPD procedure clearly increased extraction efficiency and decreased the consumption of organic solvent. The better recoveries of pyrethroids were reached by optimizing MSPD conditions. Under the excellent conditions, the linearity ranges of pyrethroids in wheat samples were obtained varying from 10 to 1000 ng g−1; the limits of detection were in the range of 1.8–2.8 ng g−1 and the precisions were lower than 6.3%. At the same time, the method was successfully applied for detection of three pyrethroids residue in six kinds of wheat samples and cyhalothrin residue detected in one wheat was 23.96 ng g−1, which is lower than the maximum residue limits allowed by the Ministry of Agriculture of the People’s Republic of China. The developed MOFs-MIPs-MSPD-GC-MS/MS method displayed high selectivity, absorbability, simplicity, rapidity, sensitivity, and excellent practical food control applicability. Keywords Matrix solid phase dispersion . Pyrethroids . Metal organic framework . Gas chromatography-tandem mass spectrometry . Molecularly imprinted polymer . Wheat
Introduction Pyrethroids are considered as pesticides of artificial synthesis which are extensively used in animals, plants, and crop (Qiu et al. 2017). However, the prolonged or incorrect use of pyrethroids will lead to resides in agricultural products (Yu et al. 2018). In addition, pyrethroids not only can cause central nervous system intoxication, but also can result in consciousness disorder, endocrine dyscrasia, immunity decline (Gao et al. 2015). As a result, many efforts should be spent to establish Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12161-018-1353-4) contains supplementary material, which is available to authorized users. * Ligang Chen [email protected] * Na Niu [email protected] 1
Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
an accurate and sensitive analytical method to detect the residues of pyrethroids (Li et al. 2017b). Recently, a mount of chromatographic separation technologies, such as packed column gas and liquid chromato
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