Carbon Dioxide Clathrates: An IR Spectroscopic Marker for Arthritis?

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The IR spectra of dry films of synovial fluid from normal and arthritic joints are presented. The spectra suggest the existence of CO2 clathrates in these fluids which are of remarkable stability in comparison to wellknown CO2 clathrate hydrates. To our knowledge, this is the first demonstration of the formation of CO2 clathrates in biological media. The proportion of CO2 clathrates found in synovial fluid appears to vary with the state of health of joints and thus may be of use in the clinical diagnosis of arthritis.

Keywords: Carbon dioxide clathrates; Infrared; Interferometry, mid-IR; Molecular structure; Spectroscopic techniques; Synovial fluid

Document Type: Invited Paper


Affiliations: 1: Institute for Biodiagnostics, National Research Council Canada, 435 Ellice Avenue, Winnipeg, Manitoba R3B 1Y6, Canada 2: Section of Rheumatology, Faculty of Medicine, University of Manitoba, St. Boniface General Hospital, 351 Tache Avenue, Winnipeg, Manitoba R2H 2A6, Canada

Publication date: September 1, 1993

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