Evaluation of Portable X-ray Fluorescence Instrumentation for in situ Measurements of Lead on Contaminated Land

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Ariadni Argyraki, Michael H. Ramsey and Philip J. Potts


Abstract

The performance of the Spectrace TN 9000 portable X-ray fluorescence (P-XRF) instrument for in situ sampling and analysis of contaminated soil was evaluated. The method was compared with laboratory analysis of the samples using ICP-AES and XRF as established methods for the assessment of contaminated land. The trueness of the field-based P-XRF results was affected by the soil moisture and the surface roughness of the in situ samples, after the correction of which, no bias was observed between the analytical results of the comparative methods. Relatively large measurement uncertainty (±55% for Pb) was caused by the small sample mass analysed and the small scale heterogeneity of the sample. This uncertainty was quantified using duplicate measurements and does not impair the delineation of ‘hot spots’ of contamination as it contributes less than 20% to the total variance. General advantages and limitations of the P-XRF methodology for the investigation of contaminated land were assessed and suggestions are made for the optimisation of the methodology.


References

  1. M. Thompson and J. N. Walsh, A Handbook of Inductively Coupled Plasma Spectrometry, Blackie, Glasgow, 1989 Search PubMed.
  2. M. H. Ramsey, A. Argyraki and M. Thompson, Analyst, 1995, 120, 1353 RSC.
  3. P. J. Potts, P. C. Webb, O. Williams-Thorpe and R. Kilworth, Analyst, 1995, 120, 1273 RSC.
  4. R. W. Puls, D. A. Clark, C. Carlson and J. Vardy, Ground Water Monit. Remed., 1994, 14, 111 Search PubMed.
  5. C. A. Kuharic, W. H. Cole, A. K. Singh and D. Gonzales, EPA Report, EPA/600/R-93/073, US Environmental Protection Agency, Washington, DC, 1993 Search PubMed.
  6. R. P. Swift, Spectroscopy, 1995, 10, 31 Search PubMed.
  7. H. A. Vincent and D. M. Boyer, ASTM Special Technical Publication, STP 1226, American Society for Testing and Materials, Philadelphia, 1995, p. 215 Search PubMed.
  8. C. A. Kuharic and W. H. Cole, Adv. X-Ray Anal., 1995, 38, 725 Search PubMed.
  9. S. M. Pyle, J. M. Nocerino, S. N. Deming, J. A. Palasota, J. M. Palasota, E. L. Miller, D. C. Hillman, C. A. Kuharic, W. H. Cole, M. A. Watson and K. D. Nichols, Environ. Sci. Technol., 1995, 30, 204 CrossRef.
  10. A. Argyraki, M. H. Ramsey and M. Thompson, Analyst, 1995, 120, 2799 RSC.
  11. M. H. Ramsey, A. Argyraki and M. Thompson, Analyst, 1995, 120, 2309 RSC.
  12. J. Maskall and I. Thornton, Land Contam. Reclam., 1993, 1, 92 Search PubMed.
  13. M. H. Ramsey, M. Thompson and M. J. Hale, Geochem. Explor., 1992, 44, 23 CrossRef CAS.
  14. B. D. Ripley and M. Thompson, Analyst, 1987, 112, 377 RSC.
  15. P. J. Potts, A Handbook of Silicate Rock Analysis, Blackie, Glasgow, 1987, p. 252 Search PubMed.
  16. A. W. Rose, H. E. Hawkes and J. S. Webb, Geochemistry in Mineral Exploration, Academic Press, London, 1979 Search PubMed.
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