Optimization of the sonication extraction method of Hibiscus tiliaceus L. flowers

The influence of several experimental parameters on the ultrasonic extraction of Hibiscus tiliaceus L. flowers were investigated: extraction time, solvent polarity, sample amount, solvent volume and sample particle size. It was concluded that the most influential variables were extraction time and s...

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Veröffentlicht in:	Ultrasonics sonochemistry 2006-04, Vol.13 (3), p.242-250
Hauptverfasser:	Soares Melecchi, Maria Inês, Péres, Valéria Flores, Dariva, Cláudio, Zini, Claudia Alcaraz, Abad, Fernanda Contieri, Martinez, Migdália Miranda, Caramão, Elina Bastos
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology Flowers - chemistry GC/MS General and physical chemistry Hibiscus - chemistry Hibiscus tiliaceus L Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Plant Extracts - analysis Solvents - chemistry Sonication Ultrasonic chemistry
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Beschreibung
Zusammenfassung:	The influence of several experimental parameters on the ultrasonic extraction of Hibiscus tiliaceus L. flowers were investigated: extraction time, solvent polarity, sample amount, solvent volume and sample particle size. It was concluded that the most influential variables were extraction time and solvent polarity. The optimized procedure employed 5 g of ground flowers, 150 mL of methanol and 140 min of extraction. The extracts were fractionated using preparative silica columns and the resulting fractions were analyzed by GC/MS. Some saturated hydrocarbons, fatty acids, fatty acid methyl esters, phytosterols, and vitamin E were identified in the plant extracts.
ISSN:	1350-4177 1873-2828
DOI:	10.1016/j.ultsonch.2005.02.003