Sorry I must have touched something that sent the message without my permission, let's continue..... I am very interested too. Actually I was thinking about a method to re-use the Cr as well....greedy Italian!!! What about something definitive like Br-pentaphlourine??(I hope the spelling is correct, otherwise sorry but it is Sunday!!!) Is it science fiction? Hope not! So please if you have any smart advice, let all us know about it and do not reply only to Eric. Cheers Francesca > >>Does anyone out there have any brilliant ideas for cleaning and re-using >>the Cr-filled quartz reactors for the Finnigan H/Device? We are getting >>really good results but it is expensive to make new quartz reactors. >>Although Cr2O3 can be slowly dissolved in acid, the small diameter of the >>reactor opening makes it difficult to do this. We are thinking of a >>pump-through system that slowly dissolves the Cr2O3. Has anyone tried >>such a thing, or perhaps has some suggestions? >> >>Thanks, >> >>Eric Steig >>________________________________________________________________________ >>Eric J. Steig, Assistant Professor tel: 215/573-5978 office >>Department of Earth & Environmental Science tel: 215/898-9890 lab >>University of Pennsylvania FAX: 215/898-0964 >>251 Hayden Hall, 240 South 33rd Street email: [log in to unmask] >>Philadelphia, PA 19104-6316 http://www.sas.upenn.edu/~esteig >> >> ########################################################################### Francesca Serra Tel. +39 040 226320 Centre for Isotope Geochemistry Fax +39 040 226320 Geokarst AREA Science Park of Trieste Padriciano 99 Trieste I-34012 NOTICE FOR PHONE CALLS TO ITALY: please be aware that, as from June 19 - 1998, both domestic and international dialings must include full area code (040 in my case), including the initial zero. ###########################################################################