Title of article :
Microencapsulation of -Carotene by Spray Drying: Effect of Wall Material Concentration and Drying Inlet Temperature
Author/Authors :
Corrêa-Filho, Luiz C. LEAF - Linking Landscape - Environment - Agriculture and Food - Instituto Superior de Agronomia - Universidade de Lisboa - Tapada da Ajuda - 1349-017 Lisboa, Portugal , Lourenço, Maria M. LEAF - Linking Landscape - Environment - Agriculture and Food - Instituto Superior de Agronomia - Universidade de Lisboa - Tapada da Ajuda - 1349-017 Lisboa, Portugal , Moldão-Martins, Margarida LEAF - Linking Landscape - Environment - Agriculture and Food - Instituto Superior de Agronomia - Universidade de Lisboa - Tapada da Ajuda - 1349-017 Lisboa, Portugal , Alves, V-tor D. LEAF - Linking Landscape - Environment - Agriculture and Food - Instituto Superior de Agronomia - Universidade de Lisboa - Tapada da Ajuda - 1349-017 Lisboa, Portugal
Abstract :
Carotenoids are a class of natural pigments found mainly in fruits and vegetables. Among them, �-carotene is regarded the most
potent precursor of vitamin A. However, it is susceptible to oxidation upon exposure to oxygen, light, and heat, which can result in
loss of colour, antioxidant activity, and vitamin activity.Tus, the objective of this work was to study the microencapsulation process
of �-carotene by spray drying, using arabic gum as wall material, to protect it against adverse environmental conditions. Tis was
carried out using the response surface methodology coupled to a central composite rotatable design, evaluating simultaneously the
efect of drying air inlet temperature (110-200∘
C) and the wall material concentration (5-35%) on the drying yield, encapsulation
efciency, loading capacity, and antioxidant activity. In addition, morphology and particles size distribution were evaluated.
Scanning electron microscopy images have shown that the particles were microcapsules with a smooth surface when produced
at the higher drying temperatures tested, most of them having a diameter lower than 10 �m. Te conditions that enabled obtaining
simultaneously arabic gum microparticles with higher �-carotene content, higher encapsulation efciency, and higher drying yield
were a wall material concentration of 11.9% and a drying inlet temperature of 173∘
C. Te systematic approach used for the study of
�-carotene microencapsulation process by spray drying using arabic gum may be easily applied for other core and wall materials.
Keywords :
Microencapsulation , Carotene , Spray Drying , Wall Material Concentration , Drying Inlet Temperature
Journal title :
International Journal of Food Science