Dear List Members, I'm interested in the possibility of measuring the H, C and O isotope composition of cellulose and wonder if anybody is in a position to help me with a couple of queries. (1) Would anybody be able to supply me with a copy of the following item- Edwards, T.W.D. & Elgood, R. 1992. Extraction of sediment cellulose for oxygen and carbon isotope analysis. Technical Proceedings 28.0, Environmental Isotope Laboratory, University of Waterloo, Ontario. 9pp. (2) Is anybody aware of an alternative to the benzene-methanol extraction for the preparation of cellulose extracts. I'm not too happy about the benzene (unless there's no alternative). Cheers, Steve Crowley Stable Isotope Laboratory University of Liverpool