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Chemical Characterisation of the USGS Reference Glasses GSA‐1G, GSC‐1G, GSD‐1G, GSE‐1G, BCR‐2G, BHVO‐2G and BIR‐1G Using EPMA, ID‐TIMS, ID‐ICP‐MS and LA‐ICP‐MS
Author(s) -
Jochum Klaus Peter,
Willbold Matthias,
Raczek Ingrid,
Stoll Brigitte,
Herwig Kirstin
Publication year - 2005
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/j.1751-908x.2005.tb00901.x
Subject(s) - electron microprobe , trace element , mineralogy , isotope dilution , analytical chemistry (journal) , matrix (chemical analysis) , geology , chemistry , geochemistry , mass spectrometry , environmental chemistry , chromatography
The USGS reference glasses GSA‐1G, GSC‐1G, GSD‐1G, GSE‐1G, BCR‐2G, BHVO‐2G and BIR‐1G were investigated by different analytical techniques. All these materials have a geological (basaltic) matrix and are therefore useful in igneous geochemistry as matrix‐matched reference materials for microanalytical techniques. The new GS glasses have trace elements in groups at concentration levels of about < 0.01, 5, 50 and 500 μg g ‐1 . Their major element compositions have been determined by EPMA, and trace elements have been analysed by LA‐ICP‐MS and two isotope dilution techniques using TIMS and ICP‐MS. EPMA and LA‐ICP‐MS analyses indicated that the USGS reference glasses are homogeneous at the μm to mm scale with respect to major (variations < 1‐2%) and most trace elements (variations 1‐4%). Trace element data obtained from the different analytical techniques agreed within an uncertainty of 1‐5%, indicating that between method results are comparable. Therefore, the preliminary working values for the four USGS GS glasses calculated from these data have a low level of uncertainty.