| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for measuring the concentration of dissolved nitrogen, capable of easily and accurately measuring the concentration of dissolved nitrogen in water to be measured. SOLUTION: The method for measuring the concentration of dissolved nitrogen includes a dissolved hydrogen removing step of removing dissolved hydrogen in the water to be measured; and a measurement step of measuring the concentration of dissolved nitrogen in the water to be measured by a thermal conductivity type detector 12 after the dissolved hydrogen removing step. In the dissolved hydrogen removing step, dissolved hydrogen in the water to be measured is preferably removed by making a platinum group catalyst contact with the water to be measured, and this step may include an oxygen addition step of adding oxygen into the water to be measured. A device for measuring the concentration of dissolved nitrogen 10 includes a dissolved hydrogen removing means 11 for removing dissolved hydrogen in the water to be measured; the thermal conductivity type detector 12; and a hydrogen removed water supplying tube 14 for supplying the water treated by the dissolved hydrogen removing means 11 to the thermal conductivity type detector 12. COPYRIGHT: (C)2010,JPO&INPIT
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