Citation:
YAN Xia, FANG Zhili, LIN Chun, WANG Guoliang, FAN Jun, ZHENG Shengrun, JIA Chengjun, ZHANG Weiguang. Preparation and Separation Performance of Three New Gas Chromatography Capillary Columns Coated with Cyclodextrin Derivatives[J]. Chinese Journal of Applied Chemistry,
;2013, 30(8): 957-962.
doi:
10.3724/SP.J.1095.2013.20470
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Three kinds of capillary columns were obtained by coating cyclodextrin derivatives onto inner surface of fused capillary. According to the literature's method,all the theoretical plate numbers are over 2800/m by using n-dodecane,indicating that they have high column efficiencies. Then,separation and mechanism of isomeric benzene derivatives,such as nitrochlorobenzene,nitroaniline,and phenylenediamine by capillary column gas chromatography have been investigated in detail. The interactions such as hydrogen bonding,dipolar-dipolar attraction and π-π stacking between analytes and stationary phases have significant effect on the separation performances of these capillary columns. For phenylenediamine,separation factors on the heptakis(6-azido-6-deoxy-2,3-di-O-p-chlorophenylcarbamoylated)-b-CD (NMCD) and per(pchlorophenylcarbamoylated)-b-CD(ACD) columns are 1.41 and 1.88,respectively,however the positional isomers can not be separated on the NSCD column. For nitrochlorobenzene,the separation factors on the mono(6A-azido-6A-deoxy) per-acetylated-β-CD(NMCD) column are 1.13 and 1.11,respectively,which are very close to those on the ACD column(1.08 and 1.15,respectively),and three positional isomers of nitrochlorobenzene can not be separated on the NSCD column. In addition,the separation of nitroaniline can not be achieved. Meanwhile,the electronic effects derived from different groups of benzene derivatives contribute mainly to the elution order of all the analytes.
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