Microencapsulation of Zn-chlorophyll pigment from Pandan leaf by spray drying and its characteristic

Microencapsulated compound of Zn-chlorophyll derivatives extracted from pandan leaf by using spray dried method can be utilized as a natural green colorant. Three different wall material types, gum arabic (GA), maltodextrin (MD) and osa-modified starch (MS), were studied based on their physicochemical properties and stabilities of the encapsulated powder. Results showed that MS powder was spherical and smooth, whereas GA and MD powders exhibited shrinkage on the surface. At 30% MS as wall material, Zn-chlorophyll powder obtained had the highest greenness value, total chlorophyll and antioxidant activity as -14.64, 187.34 mg/100gfw and 772.50 μMTEAC/g fresh mass, respectively. The MS powder provided a longer predicted half life (462 days) compared to the GA and the MD powders. This powder had green color, 2-acetyl 1- pyrroline as volatile compound with pandan leaf characteristic flavor and Zn content of 13.12 mg/kg which was safe to use as food additive.