Abstract
A method is proposed for the determination of milligram amounts of some aldohexoses and aldopentoses. After oxidation using an excess of periodate in acidic solution, the unreacted periodate is determined thermometrically by titration with mannitol, which gives reaction products which cannot react with those already produced. This removes the possibility of errors caused by interaction of the products of the oxidation reaction and the assay reaction. The method gives results as acceptable as those obtained by the Malaprade method, in a shorter time and with better sensitivity, and can be used in industrial samples where methods involving visual detection of the end point cannot be used.
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