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Article Dans Une Revue Analytica Chimica Acta Année : 2007

Towards the development of a fossil bone geochemical standard: An inter-laboratory study

V. Chavagnac
J. A. Milton
  • Fonction : Auteur
D. R. H. Green
  • Fonction : Auteur
J. Breuer
  • Fonction : Auteur
Olivier Bruguier
  • Fonction : Auteur
  • PersonId : 861964
D. E. Jacob
  • Fonction : Auteur
T. Jong
  • Fonction : Auteur
G. D. Kamenov
  • Fonction : Auteur
J. Le Huray
  • Fonction : Auteur
Yehan Liu
  • Fonction : Auteur
M. R. Palmer
  • Fonction : Auteur
Simone Pourtales
  • Fonction : Auteur
  • PersonId : 862230
I. Roduhskin
  • Fonction : Auteur
A. Soldati
  • Fonction : Auteur
C. N. Trueman
  • Fonction : Auteur
H. Yuan
  • Fonction : Auteur

Résumé

Ten international laboratories participated in an inter-laboratory comparison of a fossil bone composite with the objective of producing a matrix and structure-matched reference material for studies of the bio-mineralization of ancient fossil bone. We report the major and trace element compositions of the fossil bone composite, using in-situ method as well as various wet chemical digestion techniques. For major element concentrations, the intra-laboratory analytical precision (%RSDr) ranges from 7 to 18%, with higher percentages for Ti and K. The %RSDr are smaller than the inter-laboratory analytical precision (%RSDR; <15-30%). Trace element concentrations vary by similar to 5 orders of magnitude (0.1 mg kg(-1) for Th to 10,000 mg kg(-1) for Ba). The intra-laboratory analytical precision %RSDr varies between 8 and 45%. The reproducibility values (%RSDR) range from 13 to <50%, although extreme value >100% was found for the high field strength elements (Hf, Th, Zr, Nb). The rare earth element (REE) concentrations, which vary over 3 orders of magnitude, have %RSDr and %RSDR values at 8-15% and 20-32%, respectively. However, the REE patterns (which are very important for paleo-environmental, taphonomic and paleo-oceanographic analyses) are much more consistent. These data suggest that the complex and unpredictable nature of the mineralogical and chemical composition of fossil bone makes it difficult to set-up and calibrate analytical instruments using conventional standards, and may result in non-spectral matrix effects. We propose an analytical protocol that can be employed in future inter-laboratory studies to produce a certified fossil bone geochemical standard. (C) 2007 Elsevier B.V. All rights reserved.

Dates et versions

hal-00407629 , version 1 (27-07-2009)

Identifiants

Citer

V. Chavagnac, J. A. Milton, D. R. H. Green, J. Breuer, Olivier Bruguier, et al.. Towards the development of a fossil bone geochemical standard: An inter-laboratory study. Analytica Chimica Acta, 2007, 599 (2), pp.177-190. ⟨10.1016/j.aca.2007.08.015⟩. ⟨hal-00407629⟩
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