caa a22 4500 469129468 CHVBK 20180323133200.0 cr unu---uuuuu 170328e19920601xx s 000 0 eng 10.1007/BF00324980 doi (NATIONALLICENCE)springer-10.1007/BF00324980 Long-term stability of sulfur dioxide permeation tube standard reference materials [Elektronische Daten] [G. Mitchell, W. Dorko, P. Johnson] Summary: A series of NIST (National Institute of Standards and Technology) sulfur dioxide permeation tubes from several Standard Reference Materials (SRMs 1625 and 1627) were studied for their long-term permeation characteristics at temperatures of 20, 25 and 30°C. It was found that contrary to previous reports the steady-state permeation rate was not constant, but showed a very slight downward trend with time. During the day-to-day use of such devices the downward trend in permeation rate is small enough to go unnoticed. In addition, the permeability at 30°C and permeability activation energy of SO2 in FEP-Teflon are also evaluated for tubes that were part of the National Institute of Standards and Technology permeation tube SRM inventory from 1982 to 1989. Springer-Verlag, 1992 Mitchell G. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut Dorko W. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut Johnson P. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 344/6(1992-06-01), 229-233 0937-0633 344:6<229 1992 344 216 https://doi.org/10.1007/BF00324980 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00324980 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mitchell G. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut NATIONALLICENCE 700 1- Dorko W. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut NATIONALLICENCE 700 1- Johnson P. Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Technology Administration, US Department of Commerce, 20899, Gaithersburg, MD, USA aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 344/6(1992-06-01), 229-233 0937-0633 344:6<229 1992 344 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer