Skip to main content Accessibility help
×
Home

An Assessment of Laboratory Contamination at the Isotrace Radiocarbon Facility

  • D M Gurfinkel (a1)

Abstract

An assessment of the contamination contribution of various sample preparation procedures used at the Isotrace Radiocarbon Facility, University of Toronto, is described. Samples of geologic material, millions of years old, or samples derived therefrom, were tested because these would presumably contain only dead carbon. Results showed, however, that 14C contamination could be detected in several samples, complicating the contamination assessment. Best estimates of the contamination contribution from sample preparation were reported as: cracking: <0.17% modern, acetylene synthesis: <0.25% modern, combustion: <0.39% modern, and handling: <0.54% modern. These estimates were reported as upper limits because they likely represented 14C derived from two sources: sample preparation and the sample itself.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      An Assessment of Laboratory Contamination at the Isotrace Radiocarbon Facility
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      An Assessment of Laboratory Contamination at the Isotrace Radiocarbon Facility
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      An Assessment of Laboratory Contamination at the Isotrace Radiocarbon Facility
      Available formats
      ×

Copyright

References

Hide All
ASM Committee on pickling of iron and steel, 1964, Pickling of iron and steel in Lyman, T, ed, Metals handbook, 8th ed: Metals Parks, Ohio, Am Soc Metals, p 346356.
Beukens, R P, Gurfinkel, D M and Lee, H W, 1986, Progress at the Isotrace radiocarbon facility, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 12th, Proc: Radiocarbon, v 28, no. 2A, p 229236.
Beukens, R P and Lee, H W, 1981, The production of small carbon samples by RF dissociation of acetylene, in Kutschera, W, ed, Symposium on accelerator mass spectrometry, 2nd, Proc: Argonne Natl Lab, p 416425.
Gillespie, R and Hedges, R E M, 1984, Laboratory contamination in radiocarbon accelerator mass spectrometry: Nuclear Instruments & Methods Phys Research, Sec B, v 233, no. 2, p 294296.
Kieser, W E, Beukens, R P, Kilius, L R, Lee, H W and Litherland, A E, 1986, Isotrace radiocarbon analysis: equipment and procedures: Nuclear Instruments & Methods, v B15, p 718721.
Lepley, R H, 1978, Calcium compounds (calcium carbonate), in Grayson, M, ed, Encyclopedia of chemical technology, v 4, 3rd ed: New York, John Wiley and Sons, p 427432.
Lowdon, J A, Wilmeth, R and Blake, W Jr, 1969, Geological Survey of Canada radiocarbon dates III: Radiocarbon, v 11, no. 1, p 2242.
Mausteller, J W, Tepper, F and Rodgers, S J, 1967, Alkali metal handling and systems operating techniques: New York, Gordon and Breach.
Polach, H, Gower, J and Fraser, I, 1973, Synthesis of high purity benzene for radiocarbon dating, in Rafter, TA and Grant-Taylor, T, eds, Internatl 14C conf, 8th, Proc: Wellington, New Zealand, Royal Soc New Zealand, p B36B49.
Radnell, C J, and Muller, A B, 1980, Memory effects in the production of benzene for radiocarbon dating, in Stuiver, M and Kra, R S, eds, Internatl 14C conf, 10th, Proc: Radiocarbon, v 22, no. 2, p 479486.
Shine, N B, 1978, Carbides (calcium carbide), in Grayson, M, ed, Encyclopedia of chemical technology, v 4, 3rd ed: New York, John Wiley and Sons, p 505519.

An Assessment of Laboratory Contamination at the Isotrace Radiocarbon Facility

  • D M Gurfinkel (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed