A fibrous magnetic boron nitride nanocomposite was synthesized and is shown to be a viable adsorbent for the magnetic solid phase extraction of pesticides prior to their quantitation by gas chromatography with electron capture detection. The optimum conditions were obtained by both single factor optimization and response surface analysis (Box-Behnken design). Under the optimized conditions, the response to the ten pesticides (dicofol, α-endosulfan, p,p’-DDE, nitrofen, β-endosulfan, p,p’-DDD, p,p’-DDT, bifenthrin, permethrin and fenvalerate) is linear in the 0.03–40 ng·mL−1 concentration range with the coefficients of determination ranging from 0.9970 to 0.9992. The relative standard deviations at concentration levels of 0.5 ng·mL−1, 20 ng·mL−1 and 40 ng·mL−1 were below 8.7%. The recoveries of the analytes from spiked tea water and tea beverage samples varied between 84.5% and 122%, with relative standard deviations ranging from 4.8 to 12%. The limits of detection are between 0.01 and 0.05 ng·mL−1. The adsorbent can be reused over 50 times without significant loss of extraction efficiency.
Fibrous magnetic boron nitride Electron capture detection Pesticide residues Tea water Tea beverage
This is a preview of subscription content, log in to check access.
Financial supports from the National Natural Science Foundation of China (No. 31471643, 31571925 and 31671930), the Hebei “Double First Class Discipline” Construction Foundation for the Discipline of Food Science and Engineering of Hebei Agricultural University (2016SPGCA18), the Natural Science Foundation of Hebei Province (C2018204076), the Youth Scientific and Technological Research Foundation of the Department of Education of Hebei for Hebei Provincial Universities (QN2017085) and the Natural Science Foundation of Agricultural University of Hebei (LG201810) are gratefully acknowledged.
Compliance with ethical standards
The author(s) declare that they have no competing interests.
Lozano A, Rajski L, Belmonte-Valles N, Ucles A, Ucles S, Mezcua M, Fernandez-Alba AR (2012) Pesticide analysis in teas and chamomile by liquid chromatography and gas chromatography tandem mass spectrometry using a modified QuEChERS method: validation and pilot survey in real samples. J Chromatogr A 1268:109–122. https://doi.org/10.1016/j.chroma.2012.10.013CrossRefGoogle Scholar
Farajzadeh MA, Mohebbi A (2018) Development of magnetic dispersive solid phase extraction using toner powder as an efficient and economic sorbent in combination with dispersive liquid-liquid microextraction for extraction of some widely used pesticides in fruit juices. J Chromatogr A 1532:10–19. https://doi.org/10.1016/j.chroma.2017.11.048CrossRefGoogle Scholar
Safari M, Yamini Y, Tahmasebi E, Latifeh F (2015) Extraction and preconcentration of formaldehyde in water by polypyrrole-coated magnetic nanoparticles and determination by high-performance liquid chromatography. J Sep Sci 38(19):3421–3427. https://doi.org/10.1002/jssc.201500420CrossRefGoogle Scholar
Dargahi R, Ebrahimzadeh H, Asgharinezhad AA, Hashemzadeh A, Amini MM (2018) Dispersive magnetic solid-phase extraction of phthalate esters from water samples and human plasma based on a nanosorbent composed of MIL-101(Cr) metal-organic framework and magnetite nanoparticles before their determination by GC-MS. J Sep Sci 41(4):948–957. https://doi.org/10.1002/jssc.201700700CrossRefGoogle Scholar
Yang R, Liu Y, Yan X, Liu S (2016) Simultaneous extraction and determination of phthalate esters in aqueous solution by yolk-shell magnetic mesoporous carbon-molecularly imprinted composites based on solid-phase extraction coupled with gas chromatography-mass spectrometry. Talanta 161:114–121. https://doi.org/10.1016/j.talanta.2016.08.037CrossRefGoogle Scholar
Lin J, Xu L, Huang Y, Li J, Wang W, Feng C, Liu Z, Xu X, Zou J, Tang C (2016) Ultrafine porous boron nitride nanofibers synthesized via a freeze-drying and pyrolysis process and their adsorption properties. RSC Adv 6(2):1253–1259. https://doi.org/10.1039/c5ra23426cCrossRefGoogle Scholar
Fei H, Ye R, Ye G, Gong Y, Peng Z, Fan X, Samuel ELG, Ajayan PM, Tour JM (2014) Boron- and Nitrogen-doped graphene quantum dots/graphene hybrid nanoplatelets as efficient electrocatalysts for oxygen reduction. ACS Nano 8(10):10837–10843. https://doi.org/10.1021/nn504637yCrossRefGoogle Scholar
Zang X, Chang Q, Hou M, Wang C, Wang Z (2015) Graphene grafted magnetic microspheres for solid phase extraction of bisphenol A and triclosan from water samples followed by gas chromatography-mass spectrometric analysis. Anal Methods 7(20):8793–8800. https://doi.org/10.1039/c5ay01578bCrossRefGoogle Scholar