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Evaluation of Wood Pretreatments on Oak and Cedar

  • S. T. Hoper, F. G. McCormac, A. G. Hogg, T. F. G. Higham and M. J. Head...

Abstract

In a separate study, we conducted a series of high-precision radiocarbon measurements using wood from Britain and New Zealand to investigate interhemispheric offsets and possible temporal variations. To minimize variability associated with different species, the pretreatment of the oak (Quercus patraea) and cedar (Librocedrus bidwilli) was to α-cellulose for both. This study investigates the thoroughness of a range of pretreatment processes by the stable isotope analysis of the products.

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Copyright

Corresponding author

1 Radiocarbon Laboratory, School of Geosciences, Queen's University, Belfast, BT7 1NN, Northern Ireland
2 Radiocarbon Laboratory, University of Waikato, Private Bag 3105, Hamilton, New Zealand
3 Quaternary Dating Research Centre, Australian National University, Research School of Pacific Studies, Canberra ACT 0200, Australia

References

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Boutton, T. W. 1991 Stable carbon isotope ratios of natural materials: 1. Sample preparation and mass spectrometric analysis. In Coleman, D. C. and Fry, B. eds., Carbon Isotope Techniques. San Diego, Academic Press: 155171.
Cain, W. F. and Suess, H. E. 1976 Carbon 14 in tree rings. The Journal of Geophysical Research 81: 36883694.
Green, J. W. 1963 Wood cellulose. In Whistler, R. L., ed., Methods in Carbohydrate Chemistry 3. New York, Academic Press: 921.
Leavitt, S. W. and Long, A. 1982 Evidence for 13C and 12C fractionation between tree leaves and wood. Nature 298: 742743.
McCormac, F. G., Baillie, M. G. L., Pilcher, J. R., Brown, D. M. and Hoper, S. T. 1994 δ13C measurements from the Irish oak chronology. Radiocarbon 36(1): 2735.
McCormac, F. G., Hogg, A. G., Higham, T. F. G., Baillie, M. G. L., Palmer, J. G., Xiong, L., Pilcher, J. R., Brown, D. and Hoper, S. T. 1998 Variations of radiocarbon in tree rings: Southern Hemisphere offset preliminary results. In Stuiver, M., ed., Calibration 1998. Radiocarbon, in press.
Pearson, G. W., Pilcher, J. R., Baillie, M. G. L., Corbett, D. M. and Qua, F. 1986 High precision 14C measurements of Irish oaks to show the natural 14C variation from AD 840 to 5210 BC. In Stuiver, M. and Kra, R., eds., Proceedings of the 12th International 14C Conference. Radiocarbon 28(2A): 105–123.
Sheu, D. D. and Chiu, C. H. 1994 Evaluation of cellulose extraction procedures for stable isotope measurement in tree ring research. The International Journal of Environmental and Analytical Chemistry 59: 5967.
Stuiver, M. and Quay, P. D. 1981 Atmospheric 14C changes resulting from fossil fuel CO2 release and cosmic ray flux variability. Earth and Planetary Science Letters 53: 349362.
Tans, P. P. and Mook, W. G. 1980 Past atmospheric CO2 levels and 13C/12C ratios in tree rings. Tellus 32: 268283.
Wilson, A. T. and Grinsted, M. J. 1977 12C/13C in cellulose and lignin as palaeothermometers. Nature 265: 133135.

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