都市域における湧水の遊離炭酸濃度 ―弘前市富田の清水―

抄録

A comparison of the measured dissolved carbon dioxide concentration using a carbon dioxide electrode and the calculated dissolved carbon dioxide concentration using the activities of chemical species and equilibrium constants suggests the importance of conducting on-site measurements rather than laboratory measurements. Additionally, the calculated values derived from the activity of each chemical species and equilibrium constants were significantly affected by pH errors, highlighting the necessity of minimizing pH measurement errors as much as possible. Furthermore, the analysis of δ¹³C_DIC suggested that the dissolved carbon dioxide in Tomita’s Spring, Hirosaki City, was influenced by CO₂ originating from the decomposition of soil organic matter.