Hi Stefano,

Take care to purify the CO2 after equilibration (get rid of any HCl in
gaseous form with the CO2, it certainly is corrosive in the ion source) - I
hope that can be done by GC, or else by solid chemical trap.

Another point of interest might be how HCl in solution effects the
fractionation factor of the H2O - CO2 equilibration! Depends also on
concentration of HCl of course (in your case 1M).

Not giving you 'exact' solutions to your problem, but at least some
direction. Hope it is helpful.

Best wishes,
Pier.

-- 
Pier de Groot
Silesian University of Technology, Institute of Physics
Department of Radioisotopes, GADAM Centre of Excellence
Krzywoustego 2, 44-100 Gliwice, POLAND
tel. +48 32 237 2662, fax. +48 32 237 2254
E-mail: [log in to unmask]
http://www.carbon14.pl/


On 24-04-2007 12:29, "Stefano Bernasconi" <[log in to unmask]>
wrote:

> Dear List members,
> 
> I need to measure the oxygen isotope composition of a 1M HCl
> solution,  by CO2-equilibration with an Isoprep 18-OPTIMA. Does
> anybody have experience or know it there are problems with
> contamination and/or corrosion?
> 
> Thank you
> Stefano
> ---------------------------------------------------------------
> ETH Zurich
> Dr. Stefano Bernasconi
> Geologisches Institut
> CHN-E19.1
> Universitätstr. 16
> 8092 Zuerich
> Switzerland
> Tel. ..41-44-632 3693
> fax:  ..41-44-632 1075
> e-mail: [log in to unmask]
>