On a similar note
>
>Not really an isotope question but..
>
>What is the precsise concentration of oxygen in atmospheric air given with
>four digits?
>
Timely question as I'm wondering about it's isotopic comp.
Does anyone know if there is much variation in the oxygen isotopic
composition of atmospheric oxygen? I've carried out a literature search,
but with litle success. Kroopnick measured it to be 23.42±0.05” in 1971,
Californian air samples. Anyone point me towards a source of more recent
data, perhaps encompassing global variation.

Thanks,
Susan

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Dr. Susan Waldron,
Life Sciences Community Stable Isotope Facility,
Scottish Universities Research and Reactor Centre,
East Kilbride G75 0QF,
Scotland.

Tel: (01355) 270135
Fax: (01355) 229898
email: [log in to unmask]
http://www.gla.ac.uk/Acad/SURRC/Personnel/Acadrel/sw.htm
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