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United States Department of Agriculture

Agricultural Research Service

Research Project: ENHANCEMENT OF FRUIT AND FRUIT PRODUCT FLAVOR QUALITY USING ANALYTICAL/SENSORY METHODS

Location:

Title: Aromatic Profiles of Thymus Hyemalis and Spanish Thymus Vulgaris Essential Oils by Gc-Ms/gc-O

Authors
item Goodner, Kevin
item Plotto, Anne
item Mahattanatawee, Kanjana
item Jordan, Maria - UNIV OF MURCIA
item Sotomayor, J - UNIV OF MURCIA
item Baldwin, Elizabeth

Submitted to: International Conference on Industrial Crops and Rural Development Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: December 18, 2004
Publication Date: N/A

Technical Abstract: Thymus hyemalis L. and Spanish Thymus vulgaris L. shrubs are characterized by a great chemical intraspecific variability among plants. This fact makes it difficult to detect real changes happening in their essential oil composition during the vegetative cycle. Based on this, in the present work, clones of T. hyemalis and T. vulgaris were used to monitor real seasonal variations in the composition of the essential oil. Shrubs were harvested at five different phenological stages during the plant vegetative cycle. Capillary GC/MS with olfactometry analysis will used to determine the volatile profile of the essential oil samples. GC-Olfactometry analysis will be conducted on each phonological stage for T. hyemalis and T. vulgaris. Aroma extraction delution analysis (AEDA) will be used to determine the aroma activities of the volatile constituents of the oils. Additionly the Osme GC-O technique will be used at each dilution step to obtain more subtle information.

Last Modified: 8/22/2014