Journal
ANALYTICA CHIMICA ACTA
Volume 456, Issue 2, Pages 263-269Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0003-2670(02)00049-1
Keywords
inductively coupled plasma-mass spectrometry; hydride generation; Sn; soil
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A method was investigated for the determination of Sn in soil samples by KOH fusion followed by continuous hydride generation coupled with inductively coupled plasma mass spectrometry (HG-ICP-MS). Sample solutions in 3.0 M HCl were mixed in line with a solution of 2.4% NaBH4 and 0.25 M KOH to generate stannane gas. The mixture was delivered continuously to a gas/liquid separator and the stannane gas was introduced into a Perkin-Elmer Sciex Elan 6000 ICP-MS for concentration measurements. A method detection limit of 0.45 mg/kg was sufficient for Sn levels commonly found in soil samples. Sn concentrations as low as 2.5 mg/kg were reproducibly measured in soil samples. Sample results by HG-ICP-MS agreed within +/- 17% relative difference to results by instrumental neutron activation analysis (INAA) and within +/-6% relative difference to results by KOH fusion followed by inductively coupled plasma optical emission spectroscopy (ICP-OES). (C) 2002 Elsevier Science B.V. All rights reserved.
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