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Boron Isotopic Composition and Concentration of Ten Geological Reference Materials
Author(s) -
Rosner Martin,
Meixner Anette
Publication year - 2004
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.2004.tb00761.x
Subject(s) - boron , isotopes of boron , analytical chemistry (journal) , graphite , silicate , isotope , chemistry , mineralogy , environmental chemistry , physics , organic chemistry , quantum mechanics
We present boron isotope and concentration data from magmatic (komatiitic to rhyolitic) and sedimentary geological silicate and artificial glass reference materials that cover a wide spectrum of boron isotope compositions and boron concentrations. Boron isotope compositions were determined by TIMS (Cs 2 BO 2 + ‐graphite and BO 2 ‐ method) and boron concentrations by ICP‐AES. Boron concentrations ranged from 7 to 159μ g ‐1 and agree within 14% with published values. Based on replicate analyses of individually prepared sample aliquots an overall external reproducibility of better than 10% was determined. The obtained δ 11 B values ranged from ‐12.6 to +13.6% and were reproducible within 1.1 % (2 RSD; excluding NTIMS) on the basis of individually prepared sample aliquots. The δ 11 B values of JA‐1 (+5.3%), JB‐3 (+5.9%) and JR‐2 (+2.9%) overlap the published data within analytical uncertainty. For the first time δ 11 B values for the TB (‐12.6%) and the MPI‐DING glasses GOR‐128‐G (+13.6%), GOR‐132‐G (+7.1 %) and StHs6/80‐G (‐4.5%) are reported. The δ 11 B values obtained by the Cs 2 BO 2 + ‐graphite and the BO 2 ‐ method as well as the majority of δ 11 B values obtained using different sample preparation methods agree within analytical uncertainty. Therefore, we conclude that none of these analytical methods introduce any systematic error on the obtained δ 11 B values.