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DOI: 10.1039/A804350G (Paper) Reference Section for: J. Anal. At. Spectrom., 1998, 13, 1239-1244

Direct determination of trace metals in sea-water by inductively coupled plasma mass spectrometry

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Eivind Rosland and Walter Lund

Abstract

The direct determination of trace metals in sea-water by inductively coupled plasma mass spectrometry (ICP-MS) is described, based on sample introduction by flow injection analysis (FIA) and electrothermal vaporization (ETV). FIA-ICP-MS was used for the determination of Mn, Mo and U; 500 μl of 1+9 diluted sea-water were injected in a carrier stream of 0.028 mol l–1 HNO3. The detection limits were 0.7 μg l–1 Mn, 1.4 μg l–1 Mo and 0.10 μg l–1 U. ETV-ICP-MS was used for the determination of Cd and Pb. The analytes were vaporized as chlorides at 800[thin space (1/6-em)]°C, without interference from the matrix elements. The detection limits were 4.1 ng l–1 for Cd and 0.8 ng l–1 Pb. The FIA-ICP-MS and ETV-ICP-MS results were validated by analysing a reference sea-water sample (NASS4).

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