| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an analyzer for a carbon isotope, which can be handled at a low cost and simply by using an adsorbent. SOLUTION: An adsorption tube 11 into which an adsorbent is put or a CO2 sampling kit is used, and the adsorption tube 11 or the CO2 sampling kit is maintained in a prescribed pressure decreased state. Then, a heating device 12 is urged, a gas is desorbed so as to be introduced into a sample cell 20, the spectral intensity of<12> CO2 and that of<13> CO2 are measured by an analysis part 10, and an isotope ratio is found on the basis of their intensity ratio.</p> |
