APPLICATION OF GAS-LIQUID-CHROMATOGRAPHY TO THE ANALYSIS OF ESSENTIALOILS .17. FINGERPRINTING OF ESSENTIAL OILS BY TEMPERATURE-PROGRAMMED GAS-LIQUID-CHROMATOGRAPHY USING CAPILLARY COLUMNS WITH NONPOLAR STATIONARY PHASES
Mj. Milchard et al., APPLICATION OF GAS-LIQUID-CHROMATOGRAPHY TO THE ANALYSIS OF ESSENTIALOILS .17. FINGERPRINTING OF ESSENTIAL OILS BY TEMPERATURE-PROGRAMMED GAS-LIQUID-CHROMATOGRAPHY USING CAPILLARY COLUMNS WITH NONPOLAR STATIONARY PHASES, Analyst, 122(10), 1997, pp. 1167-1174
Problems in obtaining reproducible results when 'fingerprinting' essen
tial oils by temperature-programmed gas-liquid chromatography have bee
n reported on in Parts VII and VIII of this series. Those reports were
concerned with the general problems and the use of packed columns. Th
is report is concerned with the use of capillary columns and non-polar
stationary phases. A collaborative study using capillary columns with
non-polar stationary phases has resulted in a method which specifies
the 'g-pack value' of a column and gives reproducible relative retenti
on indices for the test compounds limonene, acetophenone, linalol, nap
hthalene, linalyl acetate and cinnamyl alcohol. The method has been ap
plied successfully to the examination of oil of rosemary, A recommende
d method is given for the reproducible temperature-programmed gas-liqu
id chromatographic fingerprinting of essential oils using capillary co
lumns with non-polar stationary phases.