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Investigation of the Analytical F14C Bone Background Value at SUERC

  • E Dunbar (a1), P Naysmith (a1), G T Cook (a1), E M Scott (a2), S Xu (a1) and B G Tripney (a1)...

The SUERC Radiocarbon Laboratory employs a one-step “background subtraction” method when calculating 14C ages. An interglacial wood (VIRI Sample K) is employed as the non-bone organic background standard, while a mammoth bone (LQH12) from Latton Quarry is used as the bone background standard. Results over several years demonstrate that the bone background is consistently around a factor of two higher and more variable than the wood background. As a result, the uncertainty on routine bone measurements is higher than for other sample types. This study investigates the factors that may contribute to the difference in F14C values and the higher variability. Preparations of collagen using modified Longin or ultrafiltration methods show no significant difference, nor does eliminating the collagen dissolution step. Two bone samples of known infinite age with respect to radiocarbon are compared and again no significant difference is observed. Finally, the quantity and age of the organic matter in the water used during the pretreatment is investigated and it is shown that there is insufficient organic matter in the reverse osmosis water to influence background values significantly. The attention is now on determining if incomplete demineralization could lead to contaminants being retained by the phosphate in the hydroxyapatite.

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Selected Papers from the 8th Radiocarbon & Archaeology Symposium, Edinburgh, UK, 27 June–1 July 2016

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Brock, F, Bronk Ramsey, C, Higham, T. 2007. Quality assurance of ultrafiltered bone dating. Radiocarbon 49(2):187192.
Brock, F, Higham, T, Bronk Ramsey, C. 2013. Comments on the use of EZEE-Filters TM and ultrafilters at ORAU. Radiocarbon 55(1):211212.
Bronk Ramsey, C, Higham, T, Bowles, A, Hedges, R. 2004. Improvements to the pretreatment of bone at Oxford. Radiocarbon 46(1):155163.
Burr, GS, Thomas, JM, Reines, D, Jeffery, D, Courtney, C, Jull, AJT, Lange, T. 2001. Sample preparation of dissolved organic carbon in groundwater for AMS 14C analysis. Radiocarbon 43(2A):183190.
Cook, GT, Higham, TFG, Naysmith, P, Brock, F, Freeman, SPHT, Bayliss, A. 2012. Assessment of infinite-age bones from the Upper Thames Valley, UK, as 14C background standards. Radiocarbon 54(3–4):845853.
Dunbar, E, Cook, GT, Naysmith, P, Tripney, B, Xu, S. 2016. AMS 14C Dating at the Scottish Universities Environmental Research Centre (SUERC) Radiocarbon Dating Laboratory. Radiocarbon 58(1):923.
Healy, F, Marshall, P, Bayliss, A, Cook, GT, Bronk Ramsey, C, van der Plicht, J, Dunbar, E. 2014. Grime’s Graves, Weeting-With-Broomhill, Norfolk Radiocarbon Dating and Chronological Modelling. Research Report Series no. 27-2014.
Higham, TFG, Jacobi, RM, Bronk Ramsey, C. 2006. AMS Radiocarbon dating of ancient bone using ultrafiltration. Radiocarbon 48(2):179195.
Hoper, ST, McCormac, FG, Hogg, AG, Higham, TFG, Head, MJ. 1998. Evaluation of wood pretreatments on oak and cedar. Radiocarbon 40(1):4550.
Lewis, SG, Maddy, D, Buckingham, C, Coope, GR, Field, MH, Keen, DH, Pike, AWG, Roe, DA, Scaife, RG, Scott, K. 2006. Pleistocene fluvial sediments, palaeontology and archaeology of the upper River Thames at Latton, Wiltshire, England. Journal of Quaternary Science 21(2):181205.
Longin, R. 1971. New method of collagen extraction for radiocarbon dating. Nature 230:241242.
Naysmith, P, Cook, GT, Freeman, SPHT, Scott, EM, Anderson, R, Xu, S, Dunbar, E, Muir, GKP, Dougans, A, Wilcken, K, Schnabel, C, Russell, N, Ascough, PL, Maden, C. 2010. 14C AMS at SUERC: improving QA data with the 5 MV tandem AMS and 250 kV SSAMS. Radiocarbon 52(2):263271.
Naysmith, P, Dunbar, E, Scott, EM, Cook, GT, Tripney, BG, Brown, R. 2017. Preliminary results for estimating the bone background uncertainties at SUERC using statistical analysis. Radiocarbon, this volume.
Scott, EM, Cook, GT, Naysmith, P, Bryant, C, O’Donnell, D. 2007. A report on phase 1 of the 5th International Radiocarbon Intercomparison (VIRI). Radiocarbon 49(2):409426.
Scott, EM, Cook, GT, Naysmith, P. 2010a. The Fifth International Radiocarbon Intercomparison (VIRI): an assessment of laboratory performance in stage 3. Radiocarbon 52(3):859865.
Scott, EM, Cook, GT, Naysmith, P. 2010b. A report on phase 2 of the Fifth International Radiocarbon Intercomparison (VIRI). Radiocarbon 52(3):846858.
Scott, EM, Naysmith, P, Cook, GT. 2017. A report on the Sixth International Radiocarbon Intercomparison (SIRI). Radiocarbon, this volume.
Scott, K, Buckingham, CM. 2001. Preliminary report on the excavation of late Middle Pleistocene deposits at Latton, near Cirencester, Gloucestershire. Quaternary Newsletter 94:2429.
Tisnérat-Laborde, N, Valladas, H, Kaltnecker, E, Arnold, M. 2003. AMS radiocarbon dating of bones at LSCE. Radiocarbon 45(3):409419.
Vogel, JS, Nelson, DE, Southon, J. 1987. 14C background levels in an AMS system. Radiocarbon 29(3):323333.
Wood, RE, Bronk Ramsey, C, Higham, TFG. 2010. Refining background corrections for radiocarbon dating of bone collagen at ORAU. Radiocarbon 52(2):600611.
Xu, S, Anderson, R, Bryant, C, Cook, GT, Dougans, A, Freeman, S, Naysmith, P, Schnabel, C, Scott, EM. 2004. Capabilities of the new SUERC 5MV AMS Facility for 14C dating. Radiocarbon 46(1):5964.
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