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Detailed Reference Information
Rasmussen et al. 1980
Rasmussen, R.A., Khalil, M.A.K., Penkett, S.A. and Prosser, N.J.D. (1980). CHClF2 (F-22) in the earth’s atmosphere. Geophysical Research Letters 7: doi: 10.1029/GL007i010p00809. issn: 0094-8276.

Recent global measurements of CHClF2 (F-22) are reported. Originally, GC/MS techniques were used to obtain these data. Since then, significant advances using an O2-doped electron capture detector have been made in the analytical techniques, so that F-22 can be measured by EC/GC methods at ambient concentrations. The atmospheric burden of F-22 calculated from these measurements (average mixing ratio, mid-1979, ~45 pptv) is considerably greater than that expected from the estimates of direct industrial emissions (average mixing ratio, mid-1979, ~30 pptv). This difference is probably due to underestimates of F-22 emissions.

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Geophysical Research Letters
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American Geophysical Union
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