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Journal of Analytical Methods in Chemistry
Volume 2012, Article ID 402081, 5 pages
http://dx.doi.org/10.1155/2012/402081
Research Article

Separation of cis- and trans-Asarone from Acorus tatarinowii by Preparative Gas Chromatography

College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China

Received 29 August 2011; Accepted 15 October 2011

Academic Editor: Lu Yang

Copyright © 2012 H. L. Zuo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A preparative gas chromatography (pGC) method was developed for the separation of isomers (cis- and trans-asarone) from essential oil of Acorus tatarinowii. The oil was primarily fractionated by silica gel chromatography using different ratios of petroleum ether and ethyl acetate as gradient elution solvents. And then the fraction that contains mixture of the isomers was further separated by pGC. The compounds were separated on a stainless steel column packed with 10% OV-101 (3 m × 6 mm, i.d.), and then the effluent was split into two gas flows. One percent of the effluent passed to the flame ionization detector (FID) for detection and the remaining 99% was directed to the fraction collector. Two isomers were collected after 90 single injections (5 uL) with the yield of 178 mg and 82 mg, respectively. Furthermore, the structures of the obtained compounds were identified as cis- and trans-asarone by 1H- and 13C-NMR spectra, respectively.