High-precision noble gas isotope analysis using multi collector noble gas mass spectrometer; Study toward practical use of noble gas method for age determination of groundwater

Kokubu, Yoko   ; Tamura, Hajimu*; Yokoyama, Tatsunori   

High precision noble gas isotope analysis of groundwater is useful to estimate age and origin of groundwater. This study presents measurement of isotope ratio using a multi-collector noble gas mass spectrometer with six collectors and an auto noble gas purification instrument. The results of measurement of neon and helium in trial samples suggest that the mass spectrometer with high precision enable the noble gas isotope analysis of groundwater.