The shipboard analysis of trace levels of sulfur hexafluoride, chlorofluorocarbon-11 and chlorofluorocarbon-12 in seawater |
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| Authors: | John L Bullister David P Wisegarver |
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| Institution: | aNOAA–PMEL, 7600 Sand Point Way NE, Seattle, WA 98115, USA |
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| Abstract: | Methods are described for the rapid (11 min) automated shipboard analysis of dissolved sulfur hexafluoride (SF6) in small volume ( 200 cm3) seawater samples. Estimated precision for the SF6 measurements is 2% or 0.02 fmol kg−1 (whichever is greater). The method also allows for the simultaneous measurement of chlorofluorocarbon-11 (CFC11) and chlorofluorocarbon-12 (CFC12) on the same water sample, with significantly improved sensitivity over previous analytical methods. |
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| Keywords: | Sulfur hexafluoride Transient tracers Analytical methods Chlorofluorocarbons |
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