Method and apparatus for determining the isotope ratio of 18 O to 16 O and 15 N to 14 N

摘要

The invention relates to a method and a device for determining the isotope ratios of ¹⁸ O and ¹⁶ O and ¹⁵ N and ¹⁴ N.; According to the invention the entrance areas of Pyrolysenvorrichtung which is connected upstream of a mass spectrometer, as well as a sample template and a sample input device is supplied with a protective gas, which has a different from the isotope to be examined atomic weight. Is preferably used as the inert gas argon. The apparatus items which are surrounded by the protective gas, according to the invention surrounded by a hood. 4