TY - JOUR
T1 - Gravimetric preparation of gas phase working standards contain6ing volatile halogenated compounds for oceanographic applications
AU - Happell, J. D.
AU - Wallace, D. W.R.
N1 - Funding Information:
Acknowledgements-We would like to thank Ben Miller and Ray Weiss at SIO, and Richard Myers and Jim Elkins at CMDL for the analysis of the standard that we used to intercalibrate our standards. We would also like to thank Jim Butler, Jim Elkins, two anonymous reviewers and Ray Weiss for their thoughtful criticisms and discussions concerning this manuscript. This work was supported in part by a Global Change Distinguished Postdoctoral Fellowship sponsored by the US Department of Energy, US Department of Energy Contract DE-AC02-76CH00016, and a NOAA Atlantic Climate Change Program project entitled “Long Term Tracer Study in the Greenland Norwegian Seas”.
PY - 1997/9
Y1 - 1997/9
N2 - Gas phase standards, containing CCl3F (CFC-11), CCl2F2 (CFC-12), CCl2FCClF2 (CFC-113), CH3CCl3 and CCl4 in the pmol mol-1 range, were prepared gravimetrically in dry N2. The standards were prepared with the relative ratios of the various compounds close to those found in seawater, to facilitate calibration of oceanic halocarbon measurements. The standards made in this study were intercalibrated against an atmospheric-ratio-based standard that was analyzed at both Scripps Institution of Oceanography (SIO) and NOAA's Climate Monitoring and Diagnostics Laboratory (CMDL). A total of 21 standards was made, with the concentrations of the above halocarbons reported on both the CMDL and SIO 1993 scales. These standards are currently being used by ten different research groups making oceanic halocarbon measurements. The average systematic deviation of all compounds in our standards was generally ±5% or less from the SIO 1993 and CMDL scales. Deviations for CH3CCl3 between our standards and the CMDL scale were slightly larger, with our standards, on average, approximately 10% lower.
AB - Gas phase standards, containing CCl3F (CFC-11), CCl2F2 (CFC-12), CCl2FCClF2 (CFC-113), CH3CCl3 and CCl4 in the pmol mol-1 range, were prepared gravimetrically in dry N2. The standards were prepared with the relative ratios of the various compounds close to those found in seawater, to facilitate calibration of oceanic halocarbon measurements. The standards made in this study were intercalibrated against an atmospheric-ratio-based standard that was analyzed at both Scripps Institution of Oceanography (SIO) and NOAA's Climate Monitoring and Diagnostics Laboratory (CMDL). A total of 21 standards was made, with the concentrations of the above halocarbons reported on both the CMDL and SIO 1993 scales. These standards are currently being used by ten different research groups making oceanic halocarbon measurements. The average systematic deviation of all compounds in our standards was generally ±5% or less from the SIO 1993 and CMDL scales. Deviations for CH3CCl3 between our standards and the CMDL scale were slightly larger, with our standards, on average, approximately 10% lower.
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U2 - 10.1016/S0967-0637(97)00035-6
DO - 10.1016/S0967-0637(97)00035-6
M3 - Article
AN - SCOPUS:0030862471
VL - 44
SP - 1725
EP - 1738
JO - Deep-Sea Research Part I: Oceanographic Research Papers
JF - Deep-Sea Research Part I: Oceanographic Research Papers
SN - 0967-0637
IS - 9-10
ER -