https://repository.ukwk.ac.id/handle/123456789/1434 Sun, 26 Apr 2026 18:23:25 GMT 2026-04-26T18:23:25Z https://repository.ukwk.ac.id/handle/123456789/1678 Title: Proporsi Pelarut Air Dengan Bahan Dan Tahapan Pengecilan Ukuran Terhadap Ekstraksi Antosianin Dari Kulit Ubi Jalar Ungu (Ipomoea Batatas Var Ayamurasaki) (Kajian Analisis Teknis Dan Finansial) Authors: Donar, Renata Abstract: Purple sweet potato (Ipomoea batatas var Ayamurasaki) is one commodity new tuber crops in Indonesia. Several studies in Japan,these sweet potatoes are rich in nutritient and anthocyanin pigment is higher than other types. Research materials used are leather purple sweet potato where generally only as animal feed or fertilizer, but now used for natural food coloring. Generally solvent using an organic solvent ethanol, currently using non organic solvent that is water, because when compared with ethanol, excess use of water is a cheap, safe, easy handling, and infinite number, but therea are shortcomings, which under normal conditions during extraction of anthocyanins, effectiveness of low water that it needs further treatment, namely to increase the temperature during extraction, so need ti study the influence of proportion of solvent water with the material and stages of size reduction. Experimental design used is Completely Randomized Design with nine treatment so that later use Duncan test. Observed variables there are two types of chemical and physical observations. Chemical observation consist of analysis of anthocyanin content and antioxidant activity, while phsical observation is viscosity. Anthocyanin content using spectrophotometry method, antioxidant activity using DPPH method, and viscosity using viscometer brookfield V-T 30. Further research is developed with the financially calculation of small scale industry by counting BEP, NPV, PP, and HPP. Calculation results show proportion of solvent water with the material and stages of size reduction influence of real of extraction anthocyanin, and then production financially of Rp 1.300,00. Fri, 01 Jan 2010 00:00:00 GMT https://repository.ukwk.ac.id/handle/123456789/1678 2010-01-01T00:00:00Z