EVALUATION OF GLOBALYIELD, COMPOSITION, ANTIOXIDANT ACTIVITY AND COST OF MANUFACTURING OF EXTRACTS FROM LEMON VERBENA (ALOYSIA TRIPHYLLA [L’HÉRIT.] BRITTON) AND MANGO (MANGIFERA INDICA L.) LEAVES CAMILA G. PEREIRA and M. ANGELA A. MEIRELES 1 Laboratório de Tecnologia Supercrítica: Extração, Fracionamento e Identificação de Extratos Vegetais – Departamento de Engenharia de Alimentos/Faculdade de Engenharia de Alimentos (College of Food Engineering) Universidade de Campinas (State University of Campinas) Cx. P. 6121, 13083-970 Campinas, São Paulo, Brazil Accepted for Publication September 13, 2006 ABSTRACT In this work, the global yields, composition and antioxidant activity (AA) of extracts from lemon verbena (Aloysia triphylla) and mango (Mangifera indica) leaves obtained by different separation processes were determined. Lemon verbena extracts were obtained by supercritical fluid extraction (SFE), while mango leaf extracts were obtained by SFE, low-pressure solvent extrac- tion (LPSE) and hydrodistillation. The extract’s constituents were analyzed by thin-layer chromatography, gas chromatography/mass spectrometry and gas chromatography/flame ionization detector. The AA of the extracts was evalu- ated by the coupled reaction of b-carotene/linolenic acid. The cost of manu- facturing (COM) was estimated for the SFE extracts. Higher global yields were obtained using SFE at 350 bar/45C (1.49%) for lemon verbena and LPSE (3.04%) for mango. The AAs of the extracts were larger than that of the b-carotene for both plants. The minimum values of COM were U.S.$26.96 and 52.45/kg of extract for lemon verbena and mango, respectively. PRACTICAL APPLICATIONS This study presented important aspects related to the production of veg- etable extracts: global yields, composition, antioxidant activity of extracts 1 Corresponding author. TEL: 55-19-3788-4033; FAX: 55-19-3788-4027; EMAIL: meireles@ fea.unicamp.br Journal of Food Process Engineering 30 (2007) 150–173. All Rights Reserved. © 2007, The Author(s) Journal compilation © 2007, Blackwell Publishing 150