White sweet potatoes have functional compounds that are good for the body in the form of inulin. Inulin is a soluble fiber that is very useful for digestion and body health. Several factors can affect the physical and chemical characteristics of inulin produced such as temperature and drying method. The study was conducted to determine the yield, physical, and chemical characteristics of white sweet potato inulin. The experimental design in the study used a Completely Randomized Design (CRD) with two factors. The extraction process is carried out by grinding sweet potatoes, mixing them with distilled water, filtering and evaporation. A variation of temperature in extraction is 40°C, 60°C, and 80° C while the foaming agent in the foam mat drying process uses 2% and 10%. The physical and chemical characteristics that were analyzed are the water absorption, solubility, availability, and moisture content of inulin. The result is that with a higher temperature and concentration of foaming agent, the yield and moisture content are getting lower while water absorption and solubility are getting higher. Whereas the analysis of availability shows that the result of all formulations is inulin even though it is assumed to have a different amount. The higher the temperature in the extraction process and the higher the concentration of foaming agent used in inulin the lower the yield.
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