Multidimensional Capillary GC−GC for the Analysis of Real Complex Samples. 3. Enantiomeric Distribution of Monoterpene Hydrocarbons and Monoterpene Alcohols of Mandarin Oils

Abstract

The enantiomeric distribution of beta-pinene, sabinene, limonene, linalool, terpinen-4-ol, and alpha-terpineol in mandarin oils has been determined using a fully-automated, multidimensional, double-oven GC-GC system. This system allows fractions to be multitransferred during the same GC analysis and the use of the two GCs independently when the multitransfer option is not used. The results obtained allowed the characterization of mandarin essential oil and the determination of extraneous oils added to or contaminating the oil.

Comprehensive two-dimensional GC for the analysis of citrus essential oils

“…[3][4][5][6][7][8][9][10] Some relatively recent papers have reported the on-line HPLC preseparation/concentration and HRGC analysis of various volatile fractions in a fully automated mode. [3][4][5][6] These effective separations have concerned monoterpene and sesquiterpene hydrocarbons and their oxygenated derivatives, as well as aliphatic compounds.…”

“…Several successful applications, especially chiral ones, have been reported in literature. [8][9][10] Although MDGC is a valuable analytical tool, it is also characterized by a few drawbacks, such as high time costs, complex instrumentation and the fact that the 2-D advantage cannot be exploited by all 1-D peaks.…”

Comparison of comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry and gas chromatography–mass spectrometry for the analysis of tobacco essential oils

“…For example, Chanegriha et al separated successfully a synthetic mixture of 19 constituents found in essential oils using the coupled columns in series, 13 of which were not separated on a single column [4]. Multi-dimensional gas chromatography (MDGC) has also been used in the analysis of essential oils [5][6][7]. These methods extend the separation power of capillary GC and clearly resolve the selected constituents in a GC chromatogram, but as Giddings stated, twodimensional continuous (and coupled column) separation had not been developed to reach its potential in chromatography [8].…”

Multidimensional Capillary GC-GC for the Analysis of Real Complex Samples. Part IV. Enantiomeric Distribution of Monoterpene Hydrocarbons and Monoterpene Alcohols of Lemon Oils

“…Moreover, when the system was not used in the multidimensional configuration, the two gas chromatographs could be used at the same time independently without any change in the hardware. This system has been used for the determination of the enantiomeric distribution of monoterpene hydrocarbons and monoterpene alcohols in lime [2] and mandarin [3] essential oils. In this paper some changes made in the pneumatic and electronic circuits to simplify the use of the instrumentation and improve his reliability are described.…”