Physics
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996gecoa..60.3143l&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 60, Issue 16, p. 3143-3149.
Physics
18
Scientific paper
Recent developments in inductively coupled plasma mass spectrometry (ICP-MS) make it possible to simultaneously measure a suite of trace elements of paleoceanographic interest in foraminifera shells from deep-sea sediments. Here we present an ICP-MS method that allows determination of precise Cd/Ca, Ba/Ca, Sr/Ca and Mn/Ca ratios in purified foraminifera shell samples as small as 25 μg. The method utilizes a combination of isotope dilution for Ba and Cd determination and internal standardization for Ca and Sr determination. Long term reproducibility of the method is 2-3% for the elemental ratios. The principal advantages of the method are that all four elemental ratios of paleoceanographic interest are generated simultaneously for a single sample of purified foraminiferal carbonate, minimizing sample size requirement, reducing analysis time, and improving correlation between proxies.
Lea David W.
Martin Pamela A.
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