Radiocarbon dating organic residues at the microgram level

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Relation between submilligram sample size and {sup 14}C activity for sample blanks (wood from Pliocene sediments) and a contemporary standard (oxalic acid) for catalytically reduced graphitic carbon was examined down to 20 micrograms. Mean age of the 1 mg wood sample blanks is now about 51.3 ka (0.168 pMC) while the mean for 20 microgram sample blanks is about 42.9 ka. So far, the lowest value for a 1-mg wood sample blank is about 60.5 ka (0.056 pMC). We have determined a mean {sup 14}C age of about 9.4 ka from a suite of 7 organic extracts from hair, bone, ... continued below

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13 p.

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Kirner, D. L.; Burky, R.; Taylor, R. E. & Southon, J. R. January 1, 1997.

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Description

Relation between submilligram sample size and {sup 14}C activity for sample blanks (wood from Pliocene sediments) and a contemporary standard (oxalic acid) for catalytically reduced graphitic carbon was examined down to 20 micrograms. Mean age of the 1 mg wood sample blanks is now about 51.3 ka (0.168 pMC) while the mean for 20 microgram sample blanks is about 42.9 ka. So far, the lowest value for a 1-mg wood sample blank is about 60.5 ka (0.056 pMC). We have determined a mean {sup 14}C age of about 9.4 ka from a suite of 7 organic extracts from hair, bone, and matting from a mummified human skeleton from Spirit Cave, Nevada. These data indicate that the Spirit Cave human is the third, oldest directly-dated, human skeleton currently known from North America.

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13 p.

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INIS; OSTI as DE97051659

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  • 7. international accelerator mass spectrometry conference, Tucson, AZ (United States), 20-24 May 1996

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  • Other: DE97051659
  • Report No.: UCRL-JC--126095
  • Report No.: CONF-9605169--8
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 461414
  • Archival Resource Key: ark:/67531/metadc682743

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  • January 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • June 27, 2016, 2:59 p.m.

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Kirner, D. L.; Burky, R.; Taylor, R. E. & Southon, J. R. Radiocarbon dating organic residues at the microgram level, article, January 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc682743/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.