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Simultaneous distillation–extraction of high-value volatile compounds from Cistus ladanifer L. by Salomé Teixeira; Adélio Mendes; Arminda Alves; Lúcia Santos is a Chemistry article available to read on EtoBox.

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The present paper describes a procedure to isolate volatiles from rock-rose (Cistus ladanifer L.) using simultaneous distillation-extraction (SDE). High-value volatile compounds (HVVC) were selected and the influence of the extraction conditions investigated. The effect of the solvent nature and extraction time on SDE efficiency was studied. The best performance was achieved with pentane in 1 h operation. The extraction efficiencies ranged from 65% to 85% and the repeatability varied between 4% and 6% (as a CV%). The C. ladanifer SDE extracts were analysed by headspace solid phase microextraction (HS-SPME) followed by gas chromatography with flame ionization detection (GC-FID). The HS-SPME sampling conditions such as fiber coating, temperature, ionic strength and exposure time were optimized. The best results were achieved with an 85 m polyacrylate fiber for a 60 min headspace extraction at 40 • C with 20% (w/v) of NaCl. For optimized conditions the recovery was in average higher than 90% for all compounds and the intermediate precision ranged from 4 to 9% (as CV %). The volatiles ␣-pinene (22.2 mg g -1 of extract), 2,2,6-trimethylcyclohexanone (6.1 mg g -1 of extract), borneol (3.

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Author

Salomé Teixeira; Adélio Mendes; Arminda Alves; Lúcia Santos

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)