TY - JOUR A1 - Rosner, M. A1 - Vogl, Jochen T1 - Approaching real uncertainty estimates for delta 11B data T2 - Mineralogical magazine N2 - The measurement uncertainty is an indispensable quality criterion of isotope ratio data and sets important limits for the general use and geochemical interpretation of such data. Despite traceability to the International System of Units (SI) or an accepted standard an uncertainty statement allows the direct comparison of isotope data which have been obtained in different laboratories and/or using different procedures. To realise traceability and comparability of isotope data a realistic uncertainty statements should include uncertainty contributions from all influence quantities. In isotope geochemistry, however, often the term uncertainty is used for terms describing the statistical dispersion of measurement results such as precision, repeatability or reproducibility. Because an measurement uncertainty must include all influence quantities even the so-called external precision or reproducibility will underestimate the overall uncertainty. Without uncertainty statement traceability and comparability of measurement results cannot be established. In cases where no uncertainty for isotope ratio data is presented it is highly recommended that at least the measurement results of a quality control sample with known isotope composition are presented which can be used to evaluate the accuracy and roughly estimate uncertainty. PB - Mineralogical Society of Great Britain and Ireland CY - London PY - 2013 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/32244 AN - OPUS4-32244 UR - http://minmag.geoscienceworld.org/content/77/5/2015.full.pdf+html SN - 1471-8022 VL - 77 IS - 5 SP - 2085 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany