JaLCDOI 10.18926/21349
Title Alternative SPECTROPHOTOMETRIC DETERMINATION OF ZIRCONIUM
FullText URL pitsr_029_001_006.pdf
Author Okuno, Takaharu| Sakanoue, Masanobu|
Abstract Neo-Thorin was previously presented by the other authers as a color-developing reagent for the spectrophotometric determination of zirconium. 1) To determine the optimum condition for the use of this method, the effects of pH, time and temperature, and the interference of several ions were checked. The following conclusions were derived from the experimental results: Absorption curve-- The zirconium Neo-Thorin complex salt shows a maximum absorption at 580 mμ against Neo-Thorin (Figs. 1 and 2). Effect of pH-- The complex salt gives a maximum absorption at pH 1. 7 (Fig. 3). Effect of time and temperature-- Color absorption is stable for a period of 15 to 200 minutes after color development at room temperature. Heating over 40°C is harmful, because of the formation of a purple precipitation. Interference by several ions-- Cations UO(2)(2+) and Fe(3+) besides Th(4+), considerably interfer with color development. The absorption of 2000 μg U corresponds to that of 10 μg Zr (Fig. 4). However, interference by Fe(3+) becomes negligible if hydroxylamine hydrochloride is added. 2) As a result of the above conclusions, the following procedure is recommended: Procedure recommended-- A few ml of sample solution, 1 ml of 20% hydroxylamine hydrochloride and 1 ml of dilute acid, if necessary, are mixed and diluted to 9 ml. To this solution, 1 ml of 0.05% Neo-Thorin is added. The pH value of the final solution is 1.7. From 15 to 200 minutes after mixing, color absorption is measured at 575 mμ. In the range of 0 to 150 μg Zr per 10 ml, the color absorption of the complex salt obeys Beer's law (Fig. 5). 3) In demonstration, this method was applied to the determination of zirconium in a uranium mineral. Table 1 shows the zirconium content of beta-uranophane from Katamo Mine, Tottori-ken.
Publication Title 岡山大学温泉研究所報告
Published Date 1961-06-25
Volume volume29
Start Page 1
End Page 6
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002310976
JaLCDOI 10.18926/21325
FullText URL pitsr_034_063_094.pdf
Author Okuno, Takaharu|
Abstract The Kamioka mine, Gifu prefecture, working the largest lead and zinc deposit in Japan, lies in the eastern corner of the Hida gneiss complex. The skarn minerals in this mining district are genetically divided into the following three groups. Skarn A : Recrystallized skarn, formed by a regional metamorphism of impure limestone beds. The creation of skarn A is same in age to the formation of the Hida metamorphic complex. Skarn B : Zoned skarn along the contact between limestone and Inishi syenitic rock, having a same origination to Shimonomoto granite. The formation of skarn B is closely related to the intrusion of Shimonomoto granite. Skarn C : Pyrometasomatic skarn, formed by pyrometasomatic replacement of limestone probably after the deposition of the Mesozoic Tetori formation. The ore deposits of the Kamioka mine are composed of the pyrometasomatic skarn (skarn C) called "Mokuji" and the hydrothermal deposits called "Shiroji". Skarn A and skarn B have no genetical relation to the ore deposits. But skarn A acts the valuable role for the stratigrahical classification of ore deposits and limestone beds.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 63
End Page 94
ISSN 0369-7142
language 英語
File Version publisher
NAID 120002310950
JaLCDOI 10.18926/21324
Title Alternative Determination of Dissolved Gases in the Ground Water at Mt. Daisen
FullText URL pitsr_034_053_062.pdf
Author Watanabe, Koji| Okuno, Takaharu|
Abstract 鳥取県大山火山の西北麓の地下水中に潜存するガス成分比は Ar : 0.34~0.40 (cc/l) 1.48~1.64 (%) O(2) : 6.69~9.08 (cc/l) 27.92~35.30 (%) N(2) : 15.16~17.23 (cc/l) 63.22~67.92 (%) の範囲内で定量できる.また,飽和度は次の如くである. O(2) : 87.8~113.9 (%) N(2) : 110.5~123.2 (%) この結果を地表水と比較して,O(2)の飽和度は小さいが,量的な差異はあまりみられず,地表水と地下水の中間的な性質を示している.地質構造,地形が溶存ガス成分比に及ぼす影響は,地下水の流通経路が長距離とみなされる場合に若干のO(2)の消費が認められ,短距離で湧出したと思われるものにはO(2)の飽和度が大きい傾向がある.また,水理地質的にみて,地質と湧出量には密接な関連を見出せるが,ガス成分には影響を与へてはいない.
Abstract Alternative The contents of the dissolved gases in the ground waters at the north west of the piedmont district of Daisen volcano, Tottori prefecture, are determined as follows. Ar: 0.34~0.40 (cc/l) 1.48~1.64 (%) O(2) : 6.69~9.08 (cc/l) 27.92~35.30 (%) N(2) : 15.16~17.23 (cc/l) 63.22~67.92 (%) The calculated degree of saturation of these ground waters with O(2) and N ranges as shown below : O(2) : 87.8~113.9 (%) N(2) : 110.5~123.2 (%) In this district, the ground water is generally of a shallow type. The degree of oxygen consumption of the water has a tendency to decrease as its pass under the ground is shorter. From the results obtained here, it is concluded that these ground water have intermediate properties of the surface and general ground water.
Publication Title 岡山大学温泉研究所報告
Published Date 1964-10-25
Volume volume34
Start Page 53
End Page 62
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002310987