Rahmadhia, S. N., Saputra, Y. A., Juwitaningtyas, T. and Rahayu, W. M. (2022) “Intelligent Packaging as a pH-Indicator Based on Cassava Starch with Addition of Purple Sweet Potato Extract (Ipomoea batatas L.)”, Journal of Functional Food and Nutraceutical, 4(1). doi: 10.33555/jffn.v4i1.90.