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

2005; Elsevier BV; Volume: 13; Issue: 3 Linguagem: Inglês

10.1016/j.ultsonch.2005.02.003

1873-2828

Maria Inês Soares Melecchi, Valéria Flores Péres, Cláudio Dariva, Cláudia Alcaraz Zini, Fernanda Contieri Abad, Migdalia Miranda Martínez, Elina Bastos Caramão,

Phytochemical and Pharmacological Studies

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.