Avaliação do potencial antioxidante de extratos ativos de plantas obtidos por extração com fluido supercrítico Evaluation of the antioxidant potential of plant extracts obtained by supercritical fluid extraction

• Main Authors: Oselys Rodriguez Justo, Ângela Maria Moraes, Gisela Pizarro de Mattos Barreto, Adriana Zerlotti Mercadante, Paulo de Tarso Vieira e Rosa
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2008-01-01
• Series: Química Nova
• Subjects: active plant extracts; supercritical fluid extraction; antioxidant activity
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422008000700019
• ISSN: 0100-4042; 1678-7064

<abstract language="eng">The aim of this work was to evaluate the antioxidant properties of ginger and rosemary extracts, obtained by supercritical extraction. The extracts were characterized by HPLC, GC-MS, phenolic compounds content and antioxidant activity. The main active compounds were identified and high content of phenolic compounds was observed. The extracts presented high antioxidant activity against the free radicals ABTS•+ (350 and 200 mM Trolox/g, for ginger and rosemary, respectively) and DPPH•+ (145 and 80 mM Trolox/g, for ginger and rosemary, respectively). These results suggested that the attained extracts are potential substitutes of synthetic antioxidants used in chemical, food and pharmaceutical industries.