Elsevier

Analytica Chimica Acta

Volume 347, Issue 3, 11 August 1997, Pages 351-358
Analytica Chimica Acta

Mass spectrometry
Measurement of bismuth at pg g−1 concentrations in snow and ice samples by thermal ionisation mass spectrometry

https://doi.org/10.1016/S0003-2670(97)00176-1Get rights and content

Abstract

A technique has been developed to measure bismuth in small volumes of snow and ice at pg g−1 concentrations by thermal ionisation mass spectrometry (TIMS). The analysis of Greenland snow accumulated at Summit from 1967 to 1989 and 8 ky old ice has yielded values between 0.02–0.9 pg g−1. After normalising to aluminium concentrations, enhancements in bismuth concentrations were found to correlate significantly with three volcanic events. These enhancements are consistent with high bismuth concentrations observed in emissions from volcanoes. Compared with ancient ice recent bismuth concentrations are enhanced relative to aluminium implying either increased volcanic activity in the recent times or, more likely, a contribution from anthropogenic sources.

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    Present address: Department of Chemistry, University of Antwerp (UIA), Universiteitsplein 1, 2610, Wilrijk, Belgium.

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