On-site field sampling and analysis of fragrance from living lavender (Lavandula angustifolia L.) flowers by solid-phase microextraction coupled to gas chromatography and ion-trap mass spectrometry.
ABSTRACT Solid-phase microextraction coupled to gas chromatography and mass spectrometry has been applied as a simple alternative method for the analysis of essential oil directly from lavender intact flowering spikes and genuine oils. All recognised major oil constituents were detected by this procedure, with results comparable to those given by a conventional method (organic solvent extraction). Distinctive chromatographic profiles were found for various species.
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ABSTRACT: S u m m a r y The influence of the time of distillation on the content and composition of the essential oil isolated from lavender (Lavandula angustifolia Mill.) by steam distillation was investigated. The maximum essential oil percentage (2%) was obtained after 2 hours of distillation, while the minimum essential oil percentage (1%) was obtained after 40 minutes of distillation. The chemical composition of the isolated oil was determined by GC-MS. Linalool (28.78– 30.68%), linalyl acetate (12.35–17.67%) and α-terpineol (7.57–11.49%) were the major com-ponents of the analysed oil.01/2010;
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ABSTRACT: A comparative study of superheated water extraction (SWE) with two conventional volatile isolation methods including hydrodistillation and Soxhlet extraction was performed on spike lavender (Lavandula latifolia Medik.). The effect of operating conditions such as temperatures from 100–175°C, pressures from 20–40 bar and flow rates from 1–4 mL/min on the extraction process was investigated. The experiments were carried out using a laboratory-built apparatus. Separation and identification of the components were carried out by GC-FID and GC/MS. The SWE of L. latifolia shows the highest extraction efficiency at 150°C, 3 mL/min and 20 bar. At the optimum operating conditions, the extraction efficiency was as high as that for hydrodistillation and Soxhlet extraction methods. The SWE method was quicker and more selective for the valuable oxygenated constituents.Journal of Essential Oil Research - J ESSENT OIL RES. 01/2008; 20(6):482-487.
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ABSTRACT: The leaves and stem-bark of Lavandula officinalis were investigated for activity against some pathogenic organisms. Phytochemical screening revealed the presence of coumarins, tannins, flavonoids, volatile oil and fatty acids. Twenty six and twenty were characterized representing 84.5% (leaf oil) and 91.4% (stem oil) of the lot of components detected. The leaf oil of the major constituents was identified as borneol (23.6%), 1, 8-cineol (17.6%), camphor (12.6%). In the stem oil of plant 1, 8-cineol (20.8%), borneol (19.2%), α-cadinol (11.3%), caryophyllene oxide (10.4%) and camphor (7.4%) were the predominating compounds. The hexane extracts of leaf and stem of plant were obtained by soxhlet apparatus. The fatty acids were derived to methyl esters and determined by gas chromatograph and mass spectrometer (GC/MS) systems. The main components of the leaf and stem (hexanic extracts) were ω-3 (43.2 and 21.0%), ω-6 (3.4 and 14.5%), palmitic acid (7.4 and 12.4%) and Bis (2-ethylhexyl) phthalate (12.8 and 16.7%), respectively. Antimicrobial activities of the crude methanol, hexane extracts and essential oil from leaf and stem were evaluated using agar diffusion method. Results, suggest potential antimicrobial activity of the essential oil and extracts of L. officinalis, which may find those application in future research for the food and pharmaceutical industry.