Contributors

Akbari‐adergani, Behrouz; Antuña-Jiménez, Daniel; Blanco‐López, M. Carmen; Cao, Shun‐an; Chen, Juanrong; Chianella, Iva; Cleij, Thomas J.; Díaz-Díaz, Goretti; Dickert, Franz L.; Diliën, Hanne; Horemans, Frederik; Iqbal, Naseer; Javanbakht, Mehran; Kaniewska, Marzena; Karras, Konstantinos; Lakshmi, Dhana; Li, Jianping; Lieberzeit, Peter A.; Liu, Yibin; Lobo-Castañón, Marı́a Jesús; Long, Fang; Marson, Silvia; Meng, Zihui; Miranda‐Ordieres, Arturo J.; Mujahid, Adnan; Nagaoka, Tsutomu; Piletsky, Sergey A.; Piletsky, Stas; Sheng, Weicheng; Shiigi, Hiroshi; Tan, Jun; Tokonami, Shinji; Trojanowicz, Marek; Tuñón‐Blanco, Paulino; Wagner, Patrick; Wang, Shanshan; Ge, Wei; Whitcombe, Michael J.; Wu, Weiwei; Yan, Xiu‐Ping; Zhang, Yun; Zhao, Zhidan; Zhao, Mingqiu; Zhao, Dongqin; Zhu, X. D.

doi:10.1016/b978-0-444-56331-6.01002-1

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“…For instance, recently we reported an off-line SPE using selective tailored polymer-based materials equilibrated with the sample for separation of some important medicinal molecules in pharmaceuticals and biological fluids [8][9][10], and online extractions where the adsorbents were filled into columns or cartridges [11,12]. In some other research, with the aim of using the benefits of membranes as SPE sorbents, we reported a membrane SPE technique for the extraction of L-tyrosine as a lung cancer biomarker using a modified polysulfone membrane [13], and the extraction of melamine as a chemical adulteration in dry milk using a modified cellulose acetate membrane [14]. Hybrid silica gel based materials are another homemade SPE sorbent, which were successfully used for the extraction of OPPs from water samples with enhanced detection limits [15].…”

Section: Introductionmentioning

confidence: 99%

Silica‐based magnetic hybrid nanocomposite for the extraction and preconcentration of some organophosphorus pesticides before gas chromatography

Malek

Nodeh

Akbari‐adergani

2018

J of Separation Science

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The precise control of pesticide residues in foodstuffs depends significantly on the clean extraction of analytes using specifically designed separation methods. In this study, a one-pot sol-gel process was used for the preparation of a magnetic hybrid silica gel tetraethylortho silicate-cyanopropyltriethoxy silane nanocomposite. The prepared material was characterized using energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, single-point specific surface area, and scanning electron microcopy. The synthesized magnetic hybrid material was used as a solid phase extraction sorbent for the extraction and preconcentration of some organophosphorus pesticides before gas chromatography with a microelectron capture detector. The performance of the proposed magnetic solid-phase extraction technique was validated by linearity (0.05-2 ng/mL), correlation coefficients (r = 0.9993-0.9997), limit of detection (0.02-0.06 ng/mL, S/N = 3, n = 3), and intraday (RSD = 1.5-8.7%, n = 3) and interday precision (RSD = 5.5-9.3%, n = 12), while the recovery in real samples and equilibrium adsorption capacity was 72.02-103.84% and 8-20 mg/g, respectively. The magnetic solid-phase extraction based on the hybrid nanocomposite revealed a high enrichment factor, an appropriate dynamic range, and great absorptive ability toward the selected organophosphorus pesticides spiked in real water samples.

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