Supercritical fluid extraction and microencapsulation of bioactive compounds from red pepper (Capsicum annum L.) by-products

  1. Romo-Hualde, A. 1
  2. Yetano-Cunchillos, A.I. 1
  3. González-Ferrero, C. 1
  4. Sáiz-Abajo, M.J. 1
  5. González-Navarro, C.J. 1
  1. 1 Centro Nacional de Tecnología y Seguridad Alimentaria
    info

    Centro Nacional de Tecnología y Seguridad Alimentaria

    San Adrián, España

Revista:
Food Chemistry

ISSN: 0308-8146

Any de publicació: 2012

Volum: 133

Número: 3

Pàgines: 1045-1049

Tipus: Article

DOI: 10.1016/J.FOODCHEM.2012.01.062 SCOPUS: 2-s2.0-84858335933 GOOGLE SCHOLAR

Altres publicacions en: Food Chemistry

Objectius de Desenvolupament Sostenible

Resum

The objective of this work was to obtain and stabilize natural vitamins from red pepper by-products. The method of obtainment was supercritical carbon dioxide extraction, studying different parameters that affect the yield. The highest extraction yield was found at 60°C, 24 MPa extraction, with no modifier added and 0.2-0.5 mm particle size. The recovered extract was a red-coloured oil. The extract was subsequently microencapsulated by spray-drying using gum arabic as wall material to avoid the degradation of vitamin over the storage time. The thermal stability of microcapsules was analysed by thermal gravimetric analysis (TGA), while size, shape and morphology of microcapsules were studied by scanning electron microscopy (SEM). The microcapsules containing pepper extract were particles of spherical shape with dents on the surface, the average size of these particles was 5.46 μm. © 2012 Elsevier Ltd. All rights reserved.