Apparatus and method for measuring the stable isotopes ratios of oxygen, hydrogen and nitrogen from inorganic and organic compounds, as well as for the determination of the quantitative elementary composition of the compounds

摘要

Device for measuring the stable isotopes ratios of oxygen, hydrogen and nitrogen of inorganic and organic compounds, as well as for the determination of the quantitative and elemental composition, wherein the sample to be examined by means of carbon as the reducing agent at elevated temperatures quantitatively into carbon monoxide, hydrogen gas and nitrogen gas and the resulting gases is transferred by means of a carrier gas are supplied to a mass spectrometer, characterised in that the reaction chamber a pyrolysis tube (1) which is made of silicon carbide, and wherein the pyrolysis tube (1) by means of seals (4) is closed off in a gas-tight manner and the seals (4) have a cooling (5).