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2011 SSITE International Conference on Future Material Research and Industry Application(FMRIA 2011)

作者： razwan muhammad sardar Yi Yang Shijuan Du Yun Wei Limin Xue Ying Guo Zhaobin Zhang Guoqing Wang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology SINOPEC Beijing research Institute of Chemical Industry

Many attempts are made to obtain the composition of vacuum gas oil（VGO） but the molecular composition of hydrogenated vacuum gas oil（HVGO） has not been studied in detailHVGO is used as a feed in fluid catalytic cracking（FCC） to produce more environmentally friendly gasolineThis paper reports the presence of linear alkyl cyclohexanes（LACHs） in HVGOSome LACHs were found in HVGO distillates of boiling point range of 370°C-550°CComplete molecular composition was analyzed using gas chromatography mass spectrometry（GC-MS）HVGO contains LACHs from C7 to C32 and n-paraffins from C5 to C38Open chain hydrocarbons are the major constituents of all the six samples of HVGOAromatic compounds were also identified but their concentration was very lowSulfur contents were about 0.26% by weight percentage（wt）.The present paper focuses on development of method for qualitative and quantitative determination of LACHs in HVGO samples using GC-MS analysis method.

关键词： linear alkylcyclohexanes hydrogenated vacuum gas oil gas chromatography mass spectrometry.

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Molecularly imprinted polymer for pre-concentration of esculetin from tobacco followed by the UPLC analysis

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Science China Chemistry 2014年第12期57卷 1751-1759,1-2页

作者： razwan sardar M. JIN Yan KONG Guang Hui LI Hai Fang LIN Jin-Ming Department of Chemistry Beijing Key Laboratory of Microanalytical Methods and Instrumentation Tsinghua University Nova Med Pharmaceuticals Pvt. Ltd. Yunnan Academy of Tobacco Agricultural Science

Molecularly imprinted polymers(MIPs)for solid-phase extraction and pre-concentration of esculetin have been successfully prepared by the bulk polymerization method using esculetin as a template *** of varying composition were prepared using different monomers(4-vinylpyridine,methacrylic acid,and acrylamide),ethylene glycol dimethacrylate as the cross-linker,2,2-azobis(2-methylpropinitrile)as the initiator,and different porogen solvents(ethanol,acetone/methanol,and acetonitrile).The best polymer was obtained when 4-vinylpyridine was used as the monomer and acetone/methanol(3:2)as the porogen solvent,whereas the template:-monomer:-cross-linker ratio was 1:4:*** imprinting factor of the selected MIPs for esculetin was *** polymers were evaluated according to their selective recognition properties for esculetin and structurally-related compounds(esculin,scopoletin,coumarin,and 7-methoxycoumarin).Chemical and morphological characterizations of the polymers were investigated by FTIR and scanning electron microscope,which confirmed a high degree of *** area,pore volume,and pore size of the polymer were investigated by Brunauer-Emmett-Teller *** were also successfully used as solid-phase adsorbent materials for the extraction of esculetin from tobacco *** contents in dried tobacco leaves were found to be(9.27±0.17)μg g-1.

关键词： molecularly imprinted polymer esculetin tobacco UPLC

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