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All Journal CHEMICA Jurnal Teknik Kimia
Delvi Aristianingsih
Universitas Ahmad Dahlan
Chemical Engineering, Chemistry & Bioengineering Energy

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Journal : CHEMICA Jurnal Teknik Kimia

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Karakteristik Fisiko-Kimia Tepung Ubi Jalar Ungu dengan Proses Perendaman Menggunakan Asam Sitrat Imam Santosa; Acnes Meyta Puspa; Delvi Aristianingsih; Endah Sulistiawati
CHEMICA: Jurnal Teknik Kimia Vol 6, No 1 (2019): Juni 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i1.12061

Abstract

A study has been made in making purple sweet potato flour through the hydrolysis process using dilute citric acid. Sweet potatoes cut 3-5 mm, soaked in citric acid in various concentrations for a certain period, washed and drained. Sweet potatoes were then roasted at 70 degrees Celsius for 24 hours and then sieved with a mesh size of 200. The sieve results were analyzed for their physical, physicochemical content and compared with wheat flour. Soaking purple sweet potato using 0.01% citric acid produces purple sweet potato flour which is brightly colored, fine flour, decreasing the ash content with a very slight acid flour odor. The carbohydrate content of sweet potatoes is almost the same as wheat flour, and the fiber content of sweet potatoes is higher.
Co-Authors Acnes Meyta Puspa Endah Sulistiawati Imam Santosa