Measurements of the diffusion and permeation constant (and hence the solubility) of helium in different types of German glass (Duran, GW, GW12, N16B, AW, and Supremax) were performed to investigate their suitability as materials for use in mass spectrometric systems for ultra low level tritium measurements on natural water samples. The measurements were conducted by the Barrer method with the helium being detected by a mass spectrometer calibrated by measurement of defined amounts of air drawn from a 0.6 litre stainless steel container. Reproducibility of the standard measurements was about ± 1.5%, the sensitivity of the quadrupole mass spectrometer varying by only about 4% for partial pressures of helium ranging from about 10-4 to 10-8 mbar. The diffusion constants decrease from Duran via GW12, GW, N16B, and AW to Supremax. The Bunsen solubilities are only slightly temperature dependent and the mean values range from 5.29 × 10-3 in Duran to 7.89 × 10-4 in AW glass.
|Original language||English (US)|
|Number of pages||5|
|State||Published - Aug 1 1990|
ASJC Scopus subject areas
- Ceramics and Composites