Reference materials, correction equations, interference by isobaric ions,
etc., are also discussed in the IAEA-TECDOC # 825: "Reference and
intercomparison materials for stable isotopes of light elements", IAEA,
1995. This document can be obtained free of charge, either in original (if
copies are still available) or as microfiche, from:

INIS Clearinghouse
International Atomic Energy Agency
PO Box 100
A-1400 Vienna, Austria

An equation to correct SO2 for O-18 is reported on pag. 25.

Roberto Gonfiantini

Director
Istituto di Geocronologia e Geochimica Isotopica del CNR
Via Cardinale Maffi 36
I-56127 Pisa
Italy
Phone +39-050-560110  -  Fax +39-050-830127
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