JaLCDOI 10.18926/40162
タイトル(別表記) Isotopic study of Hot Springs in Japan, I Techniques for oxygen isotopic analysis of spring water
フルテキストURL pitsr_040_033_040.pdf
著者 松葉谷 治| 酒井 均| 田中 ひな子| 上村 多鶴恵|
抄録 The CO(2)-H(2)O isotopic equilibration technique was studied for the routine analyses of the oxygen isotopic ratios of hot spring water. A reaction vessel containing 2 ml of water and 0.16 m mole of tank CO(2) was shaken for 18 hrs. in a constant-temperature bath at 25.0℃ (Figs. 1, 2, and 3), and the CO(2) was analyzed for the oxygen isotopic ratio by a MCKINNEY type mass spectrometer. Several aliquots of 1, 2 and 5 ml from a same water were each analyzed three times by successive equilibration (Table 1). The observed values differ depending on the volume of water but the corrected values by equation (6) indicate excellent agreement, implying the whole processes to be well controlled. The reproducibility of the isotopic analyses is better than ± 0.1‰ (Table 2) in most cases, and the accuracy would not be worse than ± 0.2‰ as demonstrated by the interlaboratory comparison of some standard samples (Table 3). Oxygen isotopic ratios of water from more than 70 hot springs in Japan are presented (Table 5). Although the results will be discussed in the following issues of this series of paper, most hot spring water have the δ(18)O values similar to those of meteoric waters in Japan. However, spring water from Arima Hot Springs, Hyogo-Pref., which has been known by its abnormally high chloride and low sulfate concentrations is of an exceptionally high δ(18)O value.
出版物タイトル 岡山大学温泉研究所報告
発行日 1971-03-26
40巻
開始ページ 33
終了ページ 40
ISSN 0369-7142
言語 Japanese
論文のバージョン publisher
NAID 120002398154