Abstract
The Karl-Fischer titration method (KF method) employing a mixture of formamide-methanol (2:1) for dissolving sample and the film method employing small bag of high density polyethylene film for drying were applied for moisture determination on caramel and sugar candy. With 25 ml of the solvent, 0.2-0.4g caramel was dissolved at 55-60°C, and then titrated by the KF reagent. In case of sugar candy, dissolving was conducted on 1-2g sample at room temperature. This KF method was rapid, and the relative errors obtained on several samples of caramel and sugar candy were ±0.1% and ±0.02%, respectively. Moisture in these samples was determined with satisfactory accuracy and precision by the film method of drying at 100°C under 20-30mmHg for 2 or 4 hours. The relative error was ±0.05%. The difference in the moisture values obtained with these two methods on the same samples was within 0.1%.
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