PHOTOMETRIC DETERMINATION OF MAGNESIUM IN NATURAL WATERS

Various colormetric methods for determining magnesium in natural waters have been studied, and the methods using 8-oxyquinolin, ammonium molybdate and titan yellow were studied most frequently(1)), following the studies on the interfering ions(2)). Brilliant yellow(3)), l-amino-2-naphthol-6-sulfonic acid(4)) and other new reagents were also used. E. D. T. A. was used, but the determination by using this reagent is not exact. Present reagent already reported by T. Ashizawa(5)), magneson II, is insoluble in water, soluble in alkali and hardly soluble in ethanol. In the existence of magnesium ion, the color of solution varies from pink-violet (in alkali) and orange (in ethanol) to blue-violet. This variation of color was evaluated photometrically by Shimadzu photoelectric spectrophotometer, and moreover the grades of interference by interfering ions were clarified

The isotopic ratio (234)U/(238)U of the ores and waters in Togo Mine, Tottori-ken, Japan

The ratio (234)U/(238)U of two groups of ores and the waters collected in Kannokura Deposit was determined by α-ray spectrometry. According to the geological and mineralogical observation, the ores of each group were formed in succession. Based on the assumption that (234)U/(238)U of the uranium in the leaching solution is higher than that in the ores, the obtained ratio supports the above mechanism of formation. Actually, the waters collected in Kannokura Deposit showed the fairly high value in (234)U/(238)U. Each stratum of a typical section of the mine was observed on the ratio, but the obtained values were in too much complicated relation to interpret

STUDIES ON THE CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE AND SULFATE FIXED TO THE SOIL IN THE MINERAL SPRING DISTRICTS (III) SIIGAKU AND YUGAKAI HOT-SPRINGS, SHIMANE PREFECTURE, JAPAN

1) In Shigaku Hot-Springs, the amounts of chloride and sulfate fixed to the soil were determined with the samples collected from various parts of the thermal spring district and its neighbourhood. The amounts of chloride and sulfate fixed to the soil were greater in the samples from the thermal spring district than in those from its neighbourhood. As the existence of other sources which would supply the chloride and foulfate to the soil is not expected, the difference in the amounts of chloride and sulfate, between the samples from the thermal spring district and it; neighbourhood, seems to be due to the effects. of thermal springs. 2) In Yugakai Hot-Springs the chloride and sulfate content and water temperatures of well waters and the amounts of chloride and sulfate fixed to the soil were determined with the samples collected from various parts of the mineral spring district. The water temperatures of well water samples from the district which has the mineral springs with higher temperatures, were higher than those from the district which has the mineral springs with lower temperatures, but for the chloride and sulfate content of the well water samples and the amounts of chloride and sulfate fixed to the soil, no difference was detected. As the existence of other sources which would supply the heat to the water is not expected, the difference in the water temperatures, between the samples from the district which has the mineral springs with higher temperatures and the district which has the mineral springs with lower temperatures, seems to be due to the effects of the mineral springs. On the other hand, for the chloride and sulfate content of well water samples and the amounts of chloride and sulfate fixed to the soil, no difference is recognized

STUDIES ON THE CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE AND SULFATE FIXED TO THE SOIL IN THE MINERAL SPRING DISTRICTS (V) HAMAMURA AND KACHIMI HOT-SPRINGS, TOTTORI PREFECTURE, JAPAN

In Hamamura and Kachimi Hot-Springs, the chloride and sulfate content and water temperatures of well waters and the amounts of chloride and sulfate fixed to the soil were determined with the samples collected from vmions parts of the mineral spring districts. The chloride and sulfate content and warter temperatures of well waters were higher in the samples collected from the thermal spring districts than in the samples collected from its neighbourhood, but for the amounts of chloride and sulfate fixed to the soil, no difference was recognized. As the existence of other sources whlch would supply the chloride, sulfate and heat to the well waters is not expected, the difference in the chloride and sulfate content and water temperatures of well waters, between the samples collected from the thermal spring districts and its neighbourhood, seems to he due to the effects of the thermal springs

EFFECT OF WATER LEVEL OF RIVER ON MINERAL SPRING (Continued)

From February to September 1954, observations were　made of the rates of flow and the water temperatures at a spring called　"Tanaka-no-Yu", Misasa Hot Springs, Tottori Prefecture. Simultaneously with these observations, the water level of the River Misasa and that of an irrigation　stream nearby were also determined. The procedures for the observations were the same as in the previous report. Comparing the results here obtaind wite those previously obtaind, and referring to the conclusions in the previous　report, the author has been led to the following conclusions. From the observations in the period from February to September, 1954, as from those in the period from June, 1953 to　January, 1954, a positive correlation　was found between the rate of flow and the water teperature, the correlarion coefficient being 0.828 (highly significant). The analsis of variance of the obseryed results showed that the rate of flow and the water temperature appear to be affected by the water levels of the River and of the irrigation stream, and also　by their interaction. This conclusion supports what was deduced in the previous report. The average water levels of the River and of the irrigation stream, the average rates of flow and the average water temperatures, for the　period from June to September in 1953, were compared with　those for the period from June to September in 1954. The differences in the average water levels of the River, the average rates of flow and the average water temperatures are significant; while that in average water levels of the　stream is not significant. From this it may be concluded that the increase in the rate of flow and the rise of the water temperature were resulted from the upheaval of the water level of the River, which followed the construction of a dam there

STUDIES ON THE CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE AND SULFATE FIXED TO THE SOIL IN THE MINERAL SPRING DISTRICTS (VI) DISTRICT NEAR THE SPRING IN KITADANI VILLAGE, TOTTORI PREFECTURE, JAPAN

In Fukudome, Kitadani Village, the chloride, sulfate and phosfate content and water temperatures of well waters and the amounts of chloride and sulhte fixed to the soil were determined with the samples collected from various parts near the spring which contains much inorganic salts. The chloride, sulfate and phosfate content of the well water samples collected from the district which surrounds the spring, were higher than those from its neighhonrhood, but for the water temperatures of the well water samples, no difference was recognized. As the existence of other sources which would supply the chloride, sulthte and phosfate to the well water is not expected, the difference in the chloride, sulfate and phosfate content of well waters between the samples collected from the A district and its neighbourhood, seems to be due to the effects of the spring which contains much inorganic salts or its sources