The Shipboard Analysis Of Trace Levels Of Sulfur Hexafluoride, Chlorofluorocarbon-11 And Chlorofluorocarbon-12 In Seawater

摘要

Methods are described for the rapid (11 min) automated shipboard analysis of dissolved sulfur hexafluoride (SF_6) in small volume (～200 cm~3) seawater samples. Estimated precision for the SF_6 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.