Starches were isolated and characterised from 10 potato cultivars grown under the same conditions (with a commercial starch for reference). The chemical composition revealed some differences amongst the starches with protein ranging from 0.30% to 0.34%, amylose 25.2% to 29.1% and phosphorus 52.6–66.2 mg 100 g-1.
What is the chemical composition of a potato?
By weight, the average russet potato is about 78.3 percent water. After water, starches and sugars compose the bulk of the potato's chemical content at about 18 percent. Non-digestible carbohydrates--or fiber--in the form of cellulose and pectin make up another 0.4 percent of the potato.
What are the physical properties of potatoes?
The physical characteristics such as size, shape, surface area, true density, bulk density and porosity of the potato are mainly related to heat and mass trans- fer. Potato in bulk is a heterogeneous mass with widely varying physical properties.
What are the chemicals in potato starch?
Potato starch consists of 21-25% amylose and 75-79% amylopectin. Industrial grade potato starch is dried to 17-18% moisture content, 0.35% ash, 0.1% water solubles, traces of nitrogen and sugar.
What are the chemical properties of the starch?
Starch is a homopolysaccharides made up of glucose units. However, the homopolysaccharide are of two types namely: amylose, which is a linear chain consisting of about 500–2000 glucose units, and amylopectin, which is highly branched and consist of over 1,000,000 glucose units.
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