Supercritical fluid extraction with modifier of antioxidant compounds from jabuticaba (Myrciaria cauliflora) by-product: economic viability

摘要

Jabuticaba (Myrciaria cauliflora) is a Brazilian grape-like fruit with extensive occurrence in the country. In spite of the very few studies about its chemical constituents some authors have reported its potentiality as a source of antioxidants compounds which are believed to play an important role in the prevention of many oxidative and inflammatory diseases. A part of production of these fruits is explored by local populations, but the majority is wasted during harvest and processes. Thus, the application of innovative technologies such as supercritical fluid extraction (SFE) processing by-products is important to obtain high quality products adding value to these products. Besides, by-products processes currently represent an increasing niche of market mainly due to their ecological, economic and social implications. Indeed it is necessary a critical analysis of chemical composition and economic viability of the extracts obtained in order to evaluate the industrial applicability. The objective of this work is to evaluate the feasibility of antioxidants recovery by supercritical fluid extraction (SFE) with co-solvent using different conditions of pressure and temperature. SFE were carried out in two temperatures (323 and 333 K) and three pressures (10, 20 and 30 MPa) using ethanol as modifier at 20% v/v, totalizing six different extraction conditions. The assays were performed in triplicate. The extracts were evaluated for their global yield (X_0) and antioxidant capacity by radical scavenging activity using DPPH method.