Browsing by Subject "Emulsion"

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    Microencapsulation of astaxanthin in a chitosan matrix
    (Elsevier, 2004-02-06) Higuera Ciapara, I.; Felix Valenzuela, L.; Argüelles Monal, W.; Goycoolea Valencia, Francisco Martín; Biología Celular e Histología
    Synthetic astaxanthin was microencapsulated in a chitosan matrix cross-linked with glutaraldehyde by using the method of multiple emulsion/solvent evaporation. A powdered product containing microcapsules with a diameter of 5–50 mm was obtained. The stability of the pigment in the microcapsules was studied under storage at 25, 35 and 45 8 °C for 8 weeks by measuring isomerization and loss of concentration of pigment. Pigments were extracted from the microcapsules with a mixture of dichloromethane/methanol (50:50) and the astaxanthin was analyzed by HPLC with a diode array detector (480 nm). Results showed that the microencapsulated pigment did not suffer isomerization nor chemical degradation under the investigated storage conditions