Amino acid racemization dating of fossil bones,I. inter-laboratory comparison of racemization measurements |
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| Authors: | Jeffrey L. Bada E. Hoopes D. Darling Graham Dungworth Henk J. Kessels Keith A. Kvenvolden David J. Blunt |
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| Affiliation: | Amino Acid Dating Laboratory, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093 U.S.A.;Laboratory of Exobiology, University of Nijmegen, Nijmegen The Netherlands;U.S. Geological Survey, Pacific-Arctic Branch of Marine Geology, 345 Middlefield Road, Menlo Park, CA 94025 U.S.A. |
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| Abstract: | Enantiomeric measurements for aspartic acid, glutamic acid, and alanine in twenty-one different fossil bone samples have been carried out by three different laboratories using different analytical methods. These inter-laboratory comparisons demonstrate that D/L aspartic acid measurements are highly reproducible, whereas the enantiomeric measurements for the other amino acids show a wide variation between the three laboratories. At present, aspartic acid measurements are the most suitable for racemization dating of bone because of their superior analytical precision. |
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