Abstract
For the investigadon of the transformation of Ca added in ‘miso’ as Ca45CO3 during the ageing, the fractional extraction with solvents was carried out. For this, H2O, 10% CH3 COOH, and N/10 HCl were used as a solvent, succesively, and Ca45-content of each fractions was estimated with its radioactivity. About 20% of total Ca45 was found in the water soluble fraction before ageing, while this value was found to increase to 36% after ageing. On the contrary, the Ca45 content in acetic acid soluble fraction decreased while ripening from 73% to 60%, and only a small amounts of it was found in HCl fraction, and the mutual difference between these two was scarcely recognized.
