My research interest is in non-traditional stable isotope geochemistry. I have been involved in the investigation of the natural variation in the isotopic composition of Mo and the experimental investigation of natural processes capable of fractionating Mo. This work was aimed at understanding the Mo cycle in the oceans and developing the potential use of the Mo isotope composition of marine sediments (in particular black shales) to track variations in global oceanic anoxia through time. I have also investigated mass bias variation and non-spectral matrix effects in MC-ICP-MS with the aim of improving the precision and accuracy of isotope ratio measurements by MC-ICP-MS.
View Selected Publications
Barling, J. and Weis, D. (2012). An isotopic perspective on mass bias and matrix effects in multi-collector inductively-coupled-plasma mass-spectrometry. Journal of Analytical Atomic Spectrometry, 27(4), 653-662. DOI: 10.1039/C2JA10382F.
Shiel, AE, Barling, J, Orians, KJ, and Weis, D. (2009). Matrix effects on the multi-collector inductively coupled plasma mass spectrometric analysis of high-precision cadmium and zinc isotope ratios Analytica Chimica Acta, 633(1), 29-37. DOI: 10.1016/j.aca.2008.11.026.
Barling, J. and Weis, D. (2008). Influence of non-spectral matrix effects on the accuracy of Pb isotope ratio measurement by MC-ICP-MS: implications for the external normalization method of instrumental mass bias correction. Journal of Analytical Atomic Spectrometry, 23(7), 1017-1025. DOI: 10.1039/b717418g
Barling, J. and Anbar, A.D. (2004). Molybdenum isotope fractionation during adsorption by manganese oxides. Earth and Planetary Science Letters, 217, 315-329.
Arnold, G.L., Anbar, A.D., Barling, J. and T.W. Lyons (2004). Molybdenum Isotope Evidence for Widespread Anoxia in Mid-Proterozoic Oceans. Science, 304, 87-89.
Brantley, S.L., Liermann, L.J., Guynn, R.L., Anbar, A.D., Icopini, G.A. and Barling, J. (2004). Fe isotope fractionation during mineral dissolution with and without bacteria. Geochimica et Cosmochimica Acta, 68, 3189-3204.
Roe, J.E., Anbar, A.D. and Barling, J. (2003). Nonbiological fractionation of Fe isotopes: evidence of an equilibrium isotope effect. Chemical Geology, 195, 69-85.
Barling, J., Arnold, G.L. and Anbar, A.D. (2001). Natural mass-dependent variations in the isotopic composition of molybdenum. Earth and Planetary Science Letters, 193, 447-457.