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The effect of distillation methods and stage of plant growth on the essential oil content and composition of Thymus kotschyanus Boiss. & Hohen
Author(s) -
Sefidkon F.,
Dabiri M.,
RahimiBidgoly A.
Publication year - 1999
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/(sici)1099-1026(199911/12)14:6<405::aid-ffj853>3.0.co;2-m
Subject(s) - steam distillation , chemistry , thymol , borneol , essential oil , carvacrol , distillation , composition (language) , botany , horticulture , chromatography , linguistics , philosophy , biology , medicine , alternative medicine , traditional chinese medicine , pathology
The essential oils were isolated by steam, hydro and water–steam distillation from the aerial parts of Thymus kotschyanus Boiss. & Hohen in three stages of plant growth (before, at the beginning of and at complete flowering). The oils were analysed by capillary GC and GC–MS. The highest oil yield was obtained by hydrodistillation method and the lowest by steam distillation. The oil yield, related to distillation method and stage of plant growth, was 0.28–1.80% w/w (the highest for complete flowering stage by hydrodistillation method). The main constituents in all of the oils were carvacrol (40.74–61.23%), thymol (7.51–26.92%), γ‐terpinene (3.72–8.25%), p ‐cymene (3.28–6.74%) and borneol (1.33–4.52%). Copyright © 1999 John Wiley & Sons, Ltd.