Dear Colleagues,

I was alerted by rumors that the Biogeochemical Laboratories at Indiana
University would no longer distribute specialty zinc for the off-line
reduction of water to elemental hydrogen for D/H analyses.  In fact, we
are continuing to supply Indiana zinc to the scientific community, and
we *never* increased the cost since its introduction in the 1980s.  We
now offer two types of Indiana zinc:  (A) The traditional formula that
has proven reliability for laboratories that can keep a constant zinc :
water ratio, and (B) a newly developed zinc formula that has a reduced
hydrogen blank ("amount effect"; see paper by Attila Demeny, 1995,
Chemical Geology, vol. 121, p. 19-25) and is especially suited for
analyses where the zinc : water ratio is hard to control.

Best wishes,                Arndt Schimmelmann
--
Arndt Schimmelmann, Ph.D.
Senior Scientist
Indiana University
Department of Geological Sciences
Biogeochemical Laboratories
1001 East 10th Street
Bloomington, IN 47405-1405
Ph   (812) 855-7645
home (812) 339-3708
FAX  (812) 855-7961
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http://php.indiana.edu/~aschimme/