Chiral Excess: Measuring the Chirality of Geographically and Seasonally Different Geranium Oils
作者:
Luigino Doimo,
RobertJ. Fletcher,
BruceR. D'Arcy,
期刊:
Journal of Essential Oil Research
(Taylor Available online 1999)
卷期:
Volume 11,
issue 3
页码: 291-299
ISSN:1041-2905
年代: 1999
DOI:10.1080/10412905.1999.9701137
出版商: Taylor & Francis Group
关键词: Pelargoniumhybrid;Geraniaceae;rose geranium;essential oil composition;enantiomeric distribution;chiral excess;total excess;seasonal variation
数据来源: Taylor
摘要:
Essential oils from Australian grown rose geranium(Pelargoniumhybrid) G1 clone, were analyzed regularly over a three year period using chiral and normal column gas chromatography. The G1 oil was compared to other commercial geranium oils using ten key chiral compounds. Comparisons were made using the new concept called chiral excess (CE), the first eluting enantiomer minus the second eluting enantiomer, and total excess (TE), the sum of all the CE's. This concept allowed the chirality of geranium oils to be expressed as a single number. TE was used to help distinguish between 18 geographically different and 24 seasonally different commercial oils. Applications of TE include classification of other chiral-containing oils and the detection of adulterants in essential oils.
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