Use silver boats -- these are more trouble to later remove from the furnace
but they do no corrode.

--Carol

At 09:37 AM 9/23/99 -0400, you wrote:
>Dear Listmembers,
>
>I am trying to analyze some atm NH4 samples for N-15 that were collected in
>denuders and washed out of the collector with sulfuric acid.  NH4 samples
>in HCl freeze-dry nicely, can be rehydraded with a drop of RO water and
>placed on chemsorb particles for analysis in a EA-CFIRMS.  Does anyone have
>a technique for analyzing NH4 samples trapped in sulfuric acid?  What
>happens if you inject conc sulfuric acid into the EA combustion column?
>
>Thanks for any help.
>
>Bill Showers
>----------------------------------------------------------
>William J. Showers
>Associate Professor
>Dept. of Marine, Earth, & Atm Sciences
>North Carolina State University
>
>(919) 515-7143 - voice
>(919) 515-7802 - fax
>[log in to unmask] - email
>