TY - CONF A1 - Steiger, Thomas T1 - COMAR - The international database for certified reference materials T2 - EURACEM Workshop on Quality in Analytical Measurements CY - Lisbon, Portugal DA - 2014-05-19 PY - 2014 AN - OPUS4-30621 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Steiger, Thomas A1 - Pradel, Rita T1 - COMAR: the international database for certified reference materials - an overview N2 - COMAR is an international database for certified reference materials. This paper describes the history, structure, content, maintenance and present situation of the database. KW - COMAR KW - Database KW - Reference materials (RMs) KW - Certified reference materials (CRMs) PY - 2015 DO - https://doi.org/10.1007/s00769-014-1079-y SN - 0949-1775 SN - 1432-0517 VL - 20 IS - 1 SP - 47 EP - 52 PB - Springer CY - Berlin AN - OPUS4-32554 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Steiger, Thomas A1 - Pradel, Rita A1 - Bremser, Wolfram A1 - Anchutina, E. A. T1 - COMAR - The international database for certified reference materials N2 - COMAR is the international database for certified reference niaterials. The article presents historical facts, the stnictutre, contents and niaintenance of the database, including the contribution of the data on certifed reference niaterials of Russian producers. KW - COMAR KW - CRM KW - RM KW - Database KW - Certified reference materials PY - 2014 SN - 2077-1177 IS - 1 SP - 71 EP - 80 AN - OPUS4-30943 LA - rus AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Recknagel, Sebastian A1 - Noack, Siegfried A1 - Steiger, Thomas A1 - Kipphardt, Heinrich A1 - Matschat, Ralf T1 - International comparability of determination of mass fractions of chromium, copper, iron, manganese and zinc in aluminium alloy: Comité consultatif pour la quantité de matière key comparison K42 N2 - The degree of equivalence within the participating national metrology institutes for the measurement results of the mass fractions of the analytes Cr, Cu, Fe, Mn and Zn in an aluminium alloy was assessed. This interlaboratory comité consultatif pour la quantité de matière key comparison (CCQM-K42) was organised as an activity of the Inorganic Analytical Working Group of CCQM. In total seven laboratories participated, six of them for all analytes. Measurands were the mass fractions of the analytes in a range of 0.05 and 0.2%. As an outcome the consistency of the results for all elements investigated was acceptable, hence satisfactory comparability was established. An aluminium based certified reference material—undisclosed to the analysts which one it was—was used as test sample. For the purpose of this study homogeneity was tested at BAM. Each laboratory was free to choose any analytical method they wanted to use for the analysis. Consequently various methods of measurement were employed: instrumental neutron activation analysis, X-ray fluorescence spectrometry (XRF) using fused cast-bead method combined with reconstitution technique, inductively coupled plasma optical emission spectrometry (ICP OES) and inductively coupled plasma mass spectrometry. Metrological traceability of the measurement results to the SI unit had to be demonstrated. Therefore, methods such as spark OES or XRF (without fused cast-bead technique)—both of them being most important methods for the analysis of metals and alloys in industrial laboratories—could not be used in the frame of the key comparison. KW - Aluminium alloy KW - International comparison KW - CCQM-K42 KW - Key comparison PY - 2010 DO - https://doi.org/10.1007/s00769-010-0641-5 SN - 0949-1775 SN - 1432-0517 VL - 15 IS - 7 SP - 401 EP - 407 PB - Springer CY - Berlin AN - OPUS4-21628 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Steiger, Thomas A1 - Pradel, Rita T1 - Improvement of COMAR database N2 - COMAR, the international database for certified reference materials (CRM) has been improved by BAM for the benefit of CRM users and producers worldwide. The usefulness of reference materials (RM) is beyond question. RM provide "measurement benchmarks" for materials testing and chemical analysis and ensure reliability and worldwide comparability of measurements in these fields. The use of RM is a basic requirement for quality assurance. In addition CRM are very important for establishing traceability, especially in chemical analysis. Even in the age of web based technologies and services finding a proper reference material is a demanding task especially for newcomers or for new kind of materials. The best choice ist to use reference material databases that collect data from several RM producers and provide information in a uniform way. COMAR has been established to help laboratories to find the proper CRM needed. The database gives information on the worldwide availibility of certified reference materials. BAM has recently improved COMAR in order to make searching in COMAR more simple and target-orientated and to make the process of updating data more efficient. KW - COMAR KW - Reference materials KW - Certified reference materials KW - RM KW - CRM KW - Metrology in chemistry PY - 2009 IS - February SP - 19 EP - 21 CY - Jerusalem, Israel AN - OPUS4-19074 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Steiger, Thomas T1 - The COMAR database- a tool for finding reference materials T2 - INMETRO seminar on reference material producer and proficiency testing provider accreditation CY - Rio de Janeiro, Brazil DA - 2008-06-05 PY - 2008 AN - OPUS4-17525 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Steiger, Thomas T1 - Improvement of COMAR- the international database for certified reference materials T2 - Anakon CY - Berlin, Germany DA - 2009-03-17 PY - 2009 AN - OPUS4-18084 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Otto, A.H. A1 - Steiger, Thomas A1 - Schrader, S. T1 - HAlCl4 in the gas phase ist stronger than HTaF6 PY - 1998 SN - 0022-4936 SN - 0009-241x SN - 1359-7345 SN - 1364-548x VL - 3 SP - 391 EP - 392 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-2693 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Steiger, Thomas A1 - Pradel, Rita T1 - COMAR2 - die internationale Datenbank für zertifizierte Referenzmaterialien im Internet T2 - GDCh-Jahrestagung Chemie 2003 ; Symposium der Fachgruppe Anstrichstoffe und Pigmente ; 17. Workshop der Fachgruppe Chemie-Information-Computer ; Jahrestagung der Fachgruppe Freiberufliche Chemiker und Inhaber Freier Unabhängiger Laboratorien CY - München, Deutschland DA - 2003-10-06 PY - 2003 SN - 3-936028-20-6 IS - 11 SP - 48 PB - Gesellschaft Deutscher Chemiker CY - Frankfurt am Main AN - OPUS4-2677 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Steudel, R. A1 - Steiger, Thomas T1 - Sulfur compounds. Part 162. Geometries and energies of the radical anion SO2- and of three isometric structures of the dithionite anion S2O4 2- alpha PY - 1993 SN - 0022-2860 SN - 1872-8014 SN - 0377-046X VL - 284 SP - 55 EP - 59 PB - Elsevier CY - Amsterdam AN - OPUS4-2678 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Otto, A.H. A1 - Schrader, S. A1 - Steiger, Thomas A1 - Schneider, M. T1 - Gas-phase deprotonation energies of sulfuric acid, perchloric acid, chlorosulfuric acid and fluorosulfuric acid PY - 1997 SN - 0956-5000 VL - 93 IS - 22 SP - 3927 EP - 3930 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-2679 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -