出版社：Japanese Society of Nutrition and Food Science
摘要：Calcium and magnesium contents of vell water (drinking water) in Tokyo-to were determined by chelatornetry. 1. The calcium contents of 200 samples of well water in wards (in Japanese“Ku”) were 2-55 ppm and those for magnesium were 1-31 ppm These results were given in Figures1, 3, and the correlation between calcium and magnesium was tabulated in Table1. 2. The calcium contents of 200 samples of well water in suburbs were 5-47 ppm and those for magnesium were 1-17 ppm. The results were given in Figures2, 4, and the correlation between calcium arid magnesium was tabulated in Table 2.
