>Dear list members,
>
>Does anyone know of a method for measuring 15N at natural abundacne
>precision using a continuous flow  C/N analyzer connected to a isotope ratio
>mass spectrometer (ANCA system)?  There are severasl published methods
>(including our own) for converting enriched NO3 to NH3 with Devarda's alloy,
>diffusing it onto acidified paper, putting the paper in tin capsule and
>burning it in the C/N analyzer.  However, I do not know if this or a similar
>procedure has ever been thouroughly evaluated for natural abundance 15N
>measurements.
>
>I would appreciate any information on any experiences anyone has had trying
>to use this method, or any method to analyze naural abundace 15N nitrate
>using an ANCA system.
>
>Thanks,
>
>Paul D. Brooks.
>

My dear friend [log in to unmask] was telling me how to do such a thing just the other day.
I'm sure if you mail him he'll be more than glad to help you.


>
>########################################################################
>Paul D. Brooks, Spectroscopist,
>Dept. ESPM,
>151 Hilgard Hall,
>UC Berkeley, Ca. 94720-3110
>USA.
>
>email [log in to unmask]
>
>phone: (510)642-3155
>FAX:   (510)643-5098
>#########################################################################
>


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