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Summary: A Mass Spectrometric System for
the Analysis of Noble Gases and
Tritium from Water Samples
U R S B E Y E R L E ,
W E R N E R A E S C H B A C H - H E R T I G , * ,
D I E T E R M . I M B O D E N , H E I N R I C H B A U R ,
T H O M A S G R A F , A N D R O L F K I P F E R
Department of Environmental Physics, Swiss Federal Institute
of Technology (ETH) and Swiss Federal Institute of
Environmental Science and Technology (EAWAG),
CH-8600 Du¨bendorf, Switzerland, and Isotope Geology,
Department of Earth Sciences, Swiss Federal Institute of
Technology (ETH), NO C61, CH-8092 Zu¨rich, Switzerland
The design, setup, and performance of a mass spectrometric
system for the analysis of noble gas isotopes (3He, 4He,
20Ne, 21Ne, 22Ne, 36Ar, 40Ar, 84Kr, 136Xe) and tritium (3H) from
water samples are described. The 3H concentration is
measured indirectly by the 3He ingrowth from radioactive
decay. After extraction, purification, and separation, the
noble gases are measured in two noncommercial double-
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