Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-49608 Zeitschriftenartikel Richter, Silke; Roethke, A.; Rienitz, O.; Matschat, Ralf; Schiel, D.; Jaehrling, R.; Goerlitz, V.; Kipphardt, Heinrich SI-traceable monoelemental solutions on the highest level of accuracy: 25 years from the foundation of CCQM to recent advances in the development of measurement methods Within the Working Group on Inorganic Analysis (IAWG) of the Consultative Committee for Amount of Substance: Metrology in Chemistry and Biology (CCQM) international key comparisons and pilot studies related to inorganic analysis are carried to ensure consistency in this field at the highest level. Some of these comparisons deal directly with the preparation and characterization of monoelemental solutions or with topics, closely related. The importance of monoelemental solutions lies in the fact that almost every measurement in inorganic analysis relies on the comparison with either a reference material, or references in form of solutions, usually (mono)elemental solutions. All quantitative measurement approaches, e.g. isotope dilution or standard addition, need an accurate reference solution made from a well characterized reference material, prepared under full gravimetric control. These primary (monoelemental) solutions do not only serve as arbitrary references/calibration solutions, but they also link up measurement results to the International System of units (SI), this way establishing the so-called metrological traceability to a measurement unit of the SI. Without such solutions on the highest possible level of accuracy and with the smallest possible associated uncertainties (for e.g. element content and/or impurities), an analysis itself can never be as good as it could be with appropriate reference solutions. This article highlights select key comparisons and pilot studies dealing with monoelemental solution related topics within the IAWG from the foundation of CCQM - 25 years ago - up to latest achievements in the field of inorganic analysis. Bristol IOP BIPM - Bureau International des Poids et Mesures 2019 Metrologia 1 23 urn:nbn:de:kobv:b43-496080 10.1088/1681-7575/ab5636 http://creativecommons.org/licenses/by/3.0/de/deed.de 2019-11-20 OPUS4-30457 Zeitschriftenartikel Hioki, A.; Nonose, N.; Liandi, M.; Jingbo, C.; Liuxing, F.; Chao, W.; Cho, K.H.; Suh, J.K.; Min, H.S.; Lim, Y.; Recknagel, Sebastian; Koenig, Maren; Vogl, Jochen; De Sena, R.C.; Dos Reis, L.A.; Borinsky, M.; Puelles, M.; Hatamleh, N.; Acosta, O.; Turk, G.; Rabb, S.; Sturgeon, R.; Methven, B.; Rienitz, O.; Jaehrling, R.; Konopelko, L.A.; Kustikov, Y.A.; Kozyreva, S.B.; Korzh, A.A. Final report of the key coamparison CCQM-K88: Determination of lead in lead-free solder containing silver and copper The CCQM-K88 key comparison was organized by the Inorganic Analysis Working Group of CCQM to test the abilities of the national metrology institutes to measure the mass fraction of lead in lead-free solder containing silver and copper. National Metrology Institute of Japan (NMIJ), National Institute of Metrology of China (NIM) and Korea Research Institute of Standards and Science (KRISS) acted as the coordinating laboratories. The participants used different measurement methods, though most of them used inductively coupled plasma optical emission spectrometry (ICP-OES) or isotope-dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). Accounting for relative expanded uncertainty, comparability of measurement results was successfully demonstrated by the participating NMIs for the measurement of the mass fraction of lead in lead-free solder at the level of 200 mg/kg. It is expected that metals at mass fractions greater than approximately 100 mg/kg in lead-free solder containing silver and copper can be determined by each participant using the same technique(s) employed for this key comparison to achieve similar uncertainties mentioned in the present report. Bristol Inst. of Physics Publ. 2013 Metrologia 50 08002, 1A (Technical Supplement 2013) 1 19 10.1088/0026-1394/50/1A/08002 2016-02-20