Published

2011-01-01

Estabilidad de Antocianinas en Jugo y Concentrado de Agraz (Vaccinium meridionale Sw.).

Keywords:

Cinética, Almacenamiento, Degradación térmica, Energía de activación. (es)

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Authors

  • José Jobanny Martínez Zambrano
  • Hugo Alfonso Rojas Sarmiento
  • Gloria Del Carmen Borda Guerra
  • Alba Nidia Hastamorir Caro
  • Michael Fernando Medina Riaño
Se estudió la cinética de la estabilidad térmica y de almacenamiento de las antocianinas en jugo y concentrado de agraz (Vaccinium meridionale Sw.) siguiendo una cinética de primer orden. La degradación de las antocianinas con la temperatura fue modelada adecuadamente con la ecuación de Arrhenius. El efecto del pH en la estabilidad térmica de las antocianinas en los concentrados de agraz se estudió a seis diferentes valores (3,0 – 8,0) en buffer citrato-fosfato. La degradación de las antocianinas fue mayor para el jugo que para el concentrado. Una disminución significante en la estabilidad de las antocianinas del concentrado se observó a pH cercano a 5,0.

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