@article{oai:soar-ir.repo.nii.ac.jp:00017642,
 author = {平林,  貴邦 and 高野,  悦子},
 journal = {信州大学教養部紀要. 第二部, 自然科学},
 month = {Feb},
 note = {It has been said that the juice from the leaves of Kaki (japanese persimmon) boiled with water contains a large amount of vitamine C (l-ascorbic acid). But the measurement of vitamine C in the leaves of Kaki has not been carried out and the results have not been found in literatures. The present paper dealed with the contents of vitamine C in the leaves of Kaki by the indophenol method using 2,6-dichlorophenol indophenol-Na and the hydrazine method using 2,4-dinitrophenyl hydrazine. Mixture of 2 g. of the sample and 100 ml. of 2.5% HPO₃ was strongly homogenized for 2 min. in mixer and filtered by glass-filter (17G₂). Vitamine C in the filtrate was measured by the indophenol method, and it in the filtrate diluted with 9 volumes of 5% HPO₃ was done by the hydrazine method. From the experiment, it was made sure that the leaves of Kaki contained a large amount of vitamine C (500-1100 mg. per 100 g. of leaves) and the content was varied according to the variation of seasons ; the maximum content was about 1100 mg. or more per 100 g. of leaves in July and August. The contents of vitamine C in the leaves dried by various methods (natural drying, ultra-red ray heating and freezing vacuum drying) were also measured., Article, 信州大学教養部紀要. 第二部, 自然科学 3: 15-21(1969)},
 pages = {15--21},
 title = {柿及小柿の葉のビタミンCについて},
 volume = {3},
 year = {1969}
}