The Effect of Citrid Acid on Isolation of Kimpul Tumber Starch (Xanthosoma Sagittifolium Schot)

Abstract

Starch is a natural polymer that can be digested to produce energy for humans and is abundantly found in plants. Starch granules consist of two main components, namely amylose and amylopectin, both of which serve as storage forms of complex carbohydrates in plants. Carbohydrates are a primary source of energy; in addition, they can be used as basic materials for various industrial applications, such as food and bioplastics. Kimpul tubers are a type of local food crop with significant potential as an alternative food source. This study aimed to identify the effect of citric acid on the isolation of kimpul starch in terms of moisture content, carbohydrate content, fat content, protein content, fiber content, and ash content. The independent variable in this study was the concentration of citric acid (2.5%, 5%, and 7.5%), arranged using a factorial Completely Randomized Design (CRD). The results showed that soaking in a citric acid solution produced starch with moisture content ranging from 6.80–11.38%, carbohydrate content of 79.29–82.99%, fat content of 1.21–2.25%, protein content of 4.27–4.60%, fiber content of 2.70–2.87%, and ash content of 0.96–1.03%.

Keywords: Characteristics,Citrid acid, Kimpul tuber, Starch