Avaliação da capacidade antioxidante do óleo vegetal oriundo da extração de astaxantina a partir da farinha e do resíduo de camarão (Litopenaeus Vannamei)

Abstract

Astaxanthin is found naturally in shrimp residues and can be extracted in varying ways. The extraction with vegetable oil contributes to stability from this carotenoid, retarding its oxidation. The advantages of the soybean oil are excellent extraction optimization and low cost.The objective of this study was to evaluate the physical and physical-chemical characteristics and the antioxidant capacity of the pigmented oils obtained from the extraction of astaxanthin from the shrimp waste (litopenaeus vannamei). The obtained pigmented oils of the shrimp waste (OW) and of the shrimp waste flour (OF) were evaluated for astaxanthin content, physical and physico-chemical characteristics and antioxidant capacity. The samples of OW and OF showed an astaxanthin content of 70.9 and 264.7 μg / g, respectively, where the decrease in moisture was responsible for this increase of 3.7 times. Likewise, its antioxidant power is directly associated with the astaxanthin contente. In the Oxygen Radical Absorption Capacity (ORAC) test, OW and OF exhibited an antioxidant activity of 0.4957 and 0.4840 μmol eq trolox / g, respectively. However, some physical and physico-chemical characteristics of OF presented changes. Therefore, the pigmented oils from shrimp waste present a significant potential for the use in food as a natural antioxidant due to its antioxidant power, as well as the low price to obtain it.