期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 6, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2004GC000852
关键词
MC-ICP-MS; USGS reference material; BHVO-1; BHVO-2; leaching; Pb isotopes
The recent development of multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) and increasing use of the technique have created the need for well-characterized rock standards, especially for isotopic systems where no internal fractionation correction can be applied. This paper presents a careful leaching experiment on the U.S. Geological Survey (USGS) reference materials BHVO-1 and BHVO-2 (Hawaiian basalts) and documents the evidence for contamination of the rock powders during processing. This contamination accounts for the difference in Pb isotopic ratios of BHVO-1 and BHVO-2 as well as for their lack of homogeneity both in Pb isotopic compositions and in some trace element contents.
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