Abstract
In the beginning, tubers have only known as a source of starch. But later on, the existence of process innovation acquaints the other product from the tuber, such as liquid sugar. In this research, tubers such as ganyong, suweg, uwi, talas, and gembili were analyzed to know its potential as being material for a sugar alternative. The process included starch production and hydrolysis using an acid catalyst. Then sugar content and density were analysed using the Luff-Schoorl and pycnometer respectively. The results showed that the highest reducing sugar content was 2.8598% which was obtained in ganyong with 6% acetic acid catalyst. The lowest sugar content was obtained in the gembili sample (0.4816%) with the addition of an acetic acid catalyst of 2%. Besides, this research confirmed that the higher concentration of the acid catalyst, the higher the reducing content in sugar alternative from tubers.
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