Study of Optimal Temperature, pH and Stability of Dragon Fruit ( Hylocereus polyrhizus ) Peel for Use as Potential Natural Colorant

摘要

The peel of Hylocereus polyrhizus is often regarded as a waste hence this study was aimed at exploring the feasibility of using the peel as a natural colorant using simple water extraction method. Samples were subjected to a series of temperatures: Room t