| 摘要 |
<p>An electrochemical oxygen pump (3) composed of a solid electrolyte is interposed in a closed gas flow path (1) in which the carrier gas circulates. A predetermined d-c voltage is applied to the oxygen pump (3) to expel oxygen out of the carrier gas, so that a sufficiently small constant oxygen partial pressure is maintained in the closed gas flow path (1). Under this condition, a sample (13) is introduced into the closed gas flow path (1), and the amount of electric power required by the oxygen pump (3) to expel released from the sample (13) is measured, in order to find the amount of oxygen contained in the sample. Thus, the amount of oxygen contained in metals, alloys, metal compounds, semi-metals and gaseous samples can be measured in absolute values quickly and highly precisely.</p> |
