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Your search keyword '"Yuan, Bi-Feng"' showing total 29 results
Start Over Author "Yuan, Bi-Feng" Journal journal of chromatography a
29 results on '"Yuan, Bi-Feng"'

28. Rapid and high-throughput determination of endogenous cytokinins in Oryza sativa by bare Fe3O4 nanoparticles-based magnetic solid-phase extraction.

Author

Cai, Bao-Dong, Zhu, Jiu-Xia, Gao, Qiang, Luo, Dan, Yuan, Bi-Feng, and Feng, Yu-Qi

Subjects
*CYTOKININS, *RICE, *IRON oxide nanoparticles, *SOLID phase extraction, *MAGNETIC separation
Abstract

Highlights: [•] A simple and high-throughput method was developed for the determination of endogenous CKs. [•] CKs were enriched with one-step MSPE procedure. [•] 10 endogenous CKs can be detected in 50mg Oryza sativa sample. [•] 40 samples could be analyzed within one day. [ABSTRACT FROM AUTHOR]

Published
2014
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29. Dispersive microextraction based on water-coated Fe3O4 followed by gas chromatography–mass spectrometry for determination of 3-monochloropropane-1,2-diol in edible oils

Author

Zhao, Qin, Wei, Fang, Xiao, Neng, Yu, Qiong-Wei, Yuan, Bi-Feng, and Feng, Yu-Qi

Subjects
*IRON compounds, *GAS chromatography/Mass spectrometry (GC-MS), *SORPTION, *EDIBLE fats & oils, *WATER analysis, *SOLID phase extraction, *SOLUTION (Chemistry), *CHEMICAL reagents
Abstract

Abstract: In the present work, we developed a novel dispersive microextraction technique by combining the advantages of liquid-phase microextraction (LPME) and magnetic solid-phase extraction (MSPE). In this method, trace amount of water directly absorbed on bare Fe3O4 to form water-coated Fe3O4 (W-Fe3O4) and rapid extraction can be achieved while W-Fe3O4 dispersed in the sample solution. The analyte adsorbed W-Fe3O4 can be easily collected and isolated from sample solution by application of a magnet. It was worth noting that in the proposed method water was used as extractant and Fe3O4 served as the supporter and retriever of water. The performance of the method was evaluated by extraction of 3-monochloropropane-1,2-diol (3-MCPD) from edible oils. The extracted 3-MCPD was then derived by a silylanization reagent (1-trimethylsilylimidazole) before gas chromatography–mass spectrometry (GC–MS) analysis. Several parameters that affected the extraction and derivatization efficiency were investigated. Our results showed that the limit of detection for 3-MCPD was 1.1ng/g. The recoveries in spiked oil samples were in the range of 70.0–104.9% with the RSDs less than 5.6% (intra-day) and 6.4% (inter-day). Taken together, the simple, rapid and cost-effective method developed in current study, offers a potential application for the extraction and preconcentration of hydrophilic analytes from complex fatty samples. [Copyright &y& Elsevier]

Published
2012
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