Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara Rt.

Istvan Gacs

Laszlo Otvos

Zoltan Vargay

Tivadar Palagyi

Dezso Banfi

Karoly Payer

Sandor Mlinko

Emilia Dobis Nee Farkas

A process for measuring the isotope content of substances containing .sup.3 H or .sup.3 H and .sup.14 C isotopes in the gas phase, by converting the hydrogen content of the sample into water and the carbon content of the sample to a gaseous substance in simultaneous oxidation processes, separating the formed water and carbon dioxide, reconverting the .sup.3 H content of the water into gaseous form, introducing the gases containing .sup.3 H and possibly also .sup.14 C separately into a detecting unit, and determining the radioactivity of said gases, in which the tritium content of the water carrying the .sup.3 H radio-activity is bonded on a contact catalyst capable of water retention or adsorption and containing activated hydrogen, the gaseous mixture, containing also .sup.14 CO.sub.2 when a sample of .sup.14 C content is analyzed, is removed and, optionally after purification, is fed into a detecting unit together with a counting gas, then the tritium adsorbed on the surface of the catalyst is continuously converted into gas phase by exchange reaction with an appropriate gas flow and is fed into a detecting unit in unchanged state, or in the form of a compound prepared from it by chemical reaction.

Process and apparatus for measuring the isotope content of substances

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Budapest, Hungary

Istvan Gacs