Dear Teppei,

     The resin can be regenerated with a chloride solution but some
organics can stick to the resin irreversibly.  We don't reuse the resin for
this reason and because it's relatively inexpensive compared with the time
and expense of the whole procedure.  BioRad has information on
regeneration.  You might call Donna Hardy at BioRad at (800) 876-3425 ext.
6761.

                                              Steve
Steven Silva
U.S. Geological Survey
345 Middlefield Rd., Mailstop 434
Menlo Park, CA 94025
ph:  (650) 329-4558
fax: (650) 329-5590
email: [log in to unmask]














                    Teppei Fukada
                    <[log in to unmask]        To:     [log in to unmask]
                    C.UK>                  cc:
                    Sent by: Stable        Subject:     Anion Column Method
                    Isotope
                    Geochemistry
                    <ISOGEOCHEM@LIS
                    T.UVM.EDU>


                    10/03/2000
                    05:41 AM
                    Please respond
                    to Stable
                    Isotope
                    Geochemistry





To Isotopers

I am planning to do the anion column method for 15N/18O in nitrate analysis
which is based on a paper published by S.R.Silva et al (Journal of
Hydrology 228 (2000) 22-36). I have already ordered resins, columns, and so
on. However, I have one question about the experimental procedure.

Has anyone tried to reuse the anion exchange resin? and
cation exchange resin (for 18O analysis)? If someone know
the method for reproducing the resin, let me know, please.


xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Teppei FUKADA
Postgraduate Research Student
School of Environmental Sciences
University of East Anglia
Norwich
NR4 7TJ
UK

Office:+44-(0)1603-593324
Home:+44-(0)1603-503379(Tel & Fax)

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