Lead isotope ratios and concentrations have been measured in seawater and marine sediment by Inductively Coupled Plasma Mass Spectrometry (ICP-MS).For seawater, solvent extraction pre-concentration and the use of a micro-concentric nebulizer allowed 1 ml of concentrate to be measured for several minutes to achieve precisions in the range 0.5-1.2% relative standard deviation for 208Pb/206Pb and 207Pb/206Pb. The environmental dispersion of trace amounts of anthropogenic Pb produced distinctive Pb isotope ratio changes in seawater and marine sediments in the immediate vicinity of a Pb-Zn concentrate shipping facility. Concentrate was found to have 208Pb/206Pb ratios in the range 2.21-2.25, whereas environmental background 208Pb/206Pb ratios were: filtered (<0.45 om) seawater, 2.13-2.15; unfiltered seawater, 2.06-2.10; sediment, 2.06-2.09. The combined Pb isotope ratio and concentration measurements by ICP-MS have provided a sensitive and cost effective monitoring tool allowing an unamabiguous assessment of the source of Pb.
Munksgaard, N., Batterham, G., & Parry, D. (1998). Lead Isotope Ratios Determined by ICP-MS: Investigation of Anthropogenic Lead in Seawater and Sediment from the Gulf of Carpentaria, Australia. Marine Pollution Bulletin, 36(7), 527-534. https://doi.org/10.1016/S0025-326X(98)00011-3