15F-7 |
Spray-drying of W/O/W multiple emulsion for obtaining microcapsule containing blend of natural colorants |
J. SOSA-FRAGOSO1, E. Ponce-Alquicira1, F. Cruz-Sosa1, E. J. Vernon-Carter2, and J. P. Pérez-Orozco2. (1) I.B., Universidad Autonoma Metropolitana-Iztapalapa, San Rafael Atlixco # 186, Col. La Vicentina, Mexico City, D.F., 09340, Mexico, (2) IPH, Universidad Autonoma Metropolitana-Iztapalapa The substitution of artificial colorants by natural colorants is often not easy to achieve as there exists a limited supply of the latter, and it is sometimes very difficult to equal a color hue of in a given foodstuff. This fact is rendered more difficult if we consider that natural colorants may be water or oil dispersible. The objetive of this work was to obtain a microcapsule containing esterified and saponified carotenoids obtained by spray-drying of W/O/W multiple emulsion. The ratios between inner and outer emulsion, biopolymer – surfactant concentrations in inner emulsion, and biopolymer-biopolymer concentration in outer aqueous phase that allow the obtention of stable W/O/W were established, measuring emulsion yield and coalescence rate of W/O and W/O/W droplets by image analysis. High yield, stable W/O/W emulsions,with W/O and W/O/W dispese phases of 0.3, yielded microcapsules with 5 g/kg total carotenoid concentration, and a thick protective shell made of mesquite gum and milk whey protein. Mesquite gum-milk whey protein blends are suitable emusifiers and provide efficient protection against environmental factors to encapsulated carotenoids.
Session 15F, Product Development
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