Methods for determining tritium content in environmental objects

Different methods of measuring tritium content in aqueous objects of the environment are considered. The methods are compared in certain parameters. The most important of them are sensitivity, rapidity, possibility of continuous measurements etc. On the basis of analysis performed the methods are chosen suitable for studying environmental objects. The structures of gas-filled sensors are analyzed. The main stages in the development of these structures are considered; the conclusions are made on advantages and disadvantages of different structures. Different electron diagrams of set-ups and gas mixture variants for filling sensors are compared