Abstract
AbstractA graded extraction procedure has been applied to the polysaccharides present in the kernels of oats, Avena sativa L. Analyses of the sugar, protein and ash content of the fractions obtained are reported. A method for the purification of the starch present in the kernels is given. Oxidation of the unfractionated starch with potassium metaperiodate showed that the ratio of terminal to non‐terminal glucose units was 1 to 27.4. Differential potentiometric iodine titrations indicatied the presence of 26.0% of amylose in the starch, and hence the average length of unit‐chain in the amylopectin component was calculated to be 20.3 glucose units. Examination of the impure intermediate starch products showed that the protein impurity interfered considerably with the interaction of the starch with potassium metaperiodate.
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