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Abstract

Following the redetermination of the Avogadro constant, the experimental conditions of the Avogadro mass spectrometer are now such that it is possible to correct for theoretically understood mass fractionation effects. This leaves small residual corrections (K(res)) which can only be determined experimentally by means of synthetic mixtures. Silicon work, to improve the Avogadro constant, has shown that the residual correction factors only deviate from unity by 0.001 or less. Results have been obtained which agree with IUPAC recommended best measurements. It seems possible to measure isotope abundance ratios of neon, krypton, xenon and argon with a precision of 1 part in 10,000. Measurement techniques and results are presented leading to high precision isotope abundances and atomic weight values for four noble gases.

Additional information

Authors: VALKIERS S, JRC Geel (BE);SCHAEFER F, JRC Geel (BE);DE BIEVRE P, JRC Geel (BE)
Bibliographic Reference: Paper presented: Third International Symposium on Separation Technology, Antwerpen (BE), August 22-27, 1993
Availability: Available from (1) as Paper EN 37510 ORA
Record Number: 199311304 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en