Hi Scott, I have read a paper in a recent issue from Journal of Synchrotron Radiation which may be of interest: J. Synchrotron Rad. (2004). 11, 204-208 [ DOI 10.1107/S0909049503028474 ] A versatile rapid-mixing and flow device for X-ray absorption spectroscopy K. Zhang, R. Liu, T. Irving and D. S. Auld Synopsis: A low-temperature rapid-mixing and flow system has been designed and implemented to monitor catalysis involving metal ions by X-ray absorption spectroscopy at the ID-18 beamline of the Advanced Photon Source. The results of the initial testing of the system are presented. The reseach in our group (Stephen Best) in Australia involves EXAFS of short-lived electrochemically generated solution species prepared via an "ex situ" continuous flow electrosynthesis cell (Australian Journal of Chemistry, Volume 54, page 705, 2001) - from what I understand though you are more interested in an "in situ" method as mentioned above. Cheers, Mark -- Mark Bondin PhD student School of Chemistry, University of Melbourne (03) 8344 7015 (Tower lab) 0409 252 983 (mobile)