ABSTRACT

A simplified analysis of He, Ne, and Ar dissolved in natural waters is proposed. The principle of this method is the gas chromatographic determination of noble gases contained in a gas phase which is placed in dissolution equilibrium with a sample water. This method does not need any vacuum line or complicated procedure. Although this method is applicable to any gas species dissolved in water, it is useful for routine analyses of He, because high sensitivity of this simplified method enables to determine a He content as low as 50 ppb, the amount of dissolved He in water equilibrated with air.