Premium
Reference Values Following ISO Guidelines for Frequently Requested Rock Reference Materials
Author(s) -
Jochum Klaus Peter,
Weis Ulrike,
Schwager Beate,
Stoll Brigitte,
Wilson Stephen A.,
Haug Gerald H.,
Andreae Meinrat O.,
Enzweiler Jacinta
Publication year - 2016
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.2015.00392.x
Subject(s) - protocol (science) , reference values , certified reference materials , isotope dilution , reference data , set (abstract data type) , confidence interval , certification , computer science , statistics , environmental science , geology , data mining , mass spectrometry , mathematics , chemistry , chromatography , detection limit , medicine , alternative medicine , pathology , law , political science , programming language
We present new reference values for nineteen USGS, GSJ and GIT‐IWG rock reference materials that belong to the most accessed samples of the GeoReM database. The determination of the reference values and their uncertainties at the 95% confidence level follows as closely as possible ISO guidelines and the Certification Protocol of the International Association of Geoanalysts. We used analytical data obtained by the state‐of‐the‐art techniques published mainly in the last 20 years and available in GeoReM. The data are grouped into four categories of different levels of metrological confidence, starting with isotope dilution mass spectrometry as a primary method. Data quality was checked by careful investigation of analytical procedures and by the application of the Horwitz function. As a result, we assign a new and more reliable set of reference values and respective uncertainties for major, minor and a large group of trace elements of the nineteen investigated rock reference materials.