Dear friends,

I am writing a chapter for Pier de Groot's book on Stable Isotope
Analytical Techniques.  My contribution deals with the use of molecular
sieves in stable isotope isotope work - mostly with emphasis on zeolites
(by default).  I am having trouble digging up references dealing with this
topic since in most publications the molecular sieve is simply part of the
method and thus usually excluded from the title or key words.  I am
therefore asking those of you how have used molecular sieves in your work
to either send me a reference or a reprint.  I am looking for examples of
the use of molecular sieves in:

attainment of good vacuum
gas sampling
purification of gases mixtures (or liquids)
cryotrapping

This would include vacuum lines, GCs, and CF instruments.

This will include water, nitrogen, oxygen, methane, carbon dioxide, sulfur
dioxide etc.

I expect that most of you have worked with zeolites (types A and X) but I
would appreciate to hear about uses of other molecular sieves such as ALPOs
(Aluminophosphates) and CMS (carbon molecular sieve , not the same as
activated charcoal).  If possible specify the trade name and condition
(e.g. pellets).

Thank you very much,

Hal Karlsson

Dr. Haraldur R. Karlsson
Associate Professor of Geosciences
Department of Geosciences, and
Department of Chemistry and Biochemistry (joint)
Texas Tech University
Box 41053
Lubbock, TX 79409, USA

(806)-742-3130 office
(806)-742-3112 lab
(806)-742-0100 Dept. fax