Lead isotope ratios determined by ICP-MS: Investigation of anthropogenic lead in seawater and sediment from the Gulf of Carpentaria, Australia

被引：44

作者：

Munksgaard, NC ^{[1
]}

Batterham, GJ ^{[1
]}

Parry, DL ^{[1
]}

机构：

[1] No Terr Univ, Sch Math & Phys Sci, Darwin, NT 0909, Australia

来源：

MARINE POLLUTION BULLETIN | 1998年 / 36卷 / 07期

基金：

澳大利亚研究理事会;

关键词：

lead isotopes; ICP-MS; seawater; sediment; monitoring;

D O I：

10.1016/S0025-326X(98)00011-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 mi of concentrate to be measured for several minutes to achieve precisions in the range 0.5-1.2% relative standard deviation for Pb-208/Pb-206 and Pb-207/Pb-206. 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 Pb-208/Pb-206 ratios in the range 2.21-2.25, whereas environmental background Pb-208/Pb-206 ratios were: filtered (<0.45 mu m) 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 unambiguous assessment of the source of Pb, (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：527 / 534

页数：8

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