| Zugriffsnummer | 19348 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Traceability system for elemental analysis |
| Autor(in); Institution |
Kipphardt, Heinrich; Bundesanstalt für Materialforschung und -prüfung (BAM), Fachgruppe I.1, Berlin, GERMANY
Matschat, Ralf; Bundesanstalt für Materialforschung und -prüfung (BAM), Labor I.11, Berlin, GERMANY
Rienitz, Olaf; 3.1, Metrologie in der Chemie, PTB-Braunschweig
Schiel, Detlef; 3.1, Metrologie in der Chemie, PTB-Braunschweig
Gernand, Wolfgang; Merck KGaA, Darmstadt, GERMANY
Oeter, Dietmar; Merck KGaA, Darmstadt, GERMANY
|
| Quelle/Jahr | Accreditation and Quality Assurance: 10 (2006), 11, 633 - 639 |
| ISSN | 0949-1775 (PRINT) ; 1432-0517 (ONLINE) |
| DOI | |
| Verlag | Berlin [u.a.]: Springer |
| Freie Schlagworte | Elemental analysis ; Traceability ; Elemental calibration solutions ; Pure substances ; Precision measurement of elements |
| Zusammenfassung | A complete metrological traceability system for measurement resulsts of chemical analysis was set up. Core components are pure substances (national standards) characterised at the highest metrological level, primary solutions prepared from these pure substances and secondary solutions deduced from the primary solutions and intended for sale. The relative uncertainty of the element mass fraction of the primary substances and solutions is < 0.01 and < 0.05%, respectively. For the certification of transfer solutions and for stability testing, a precision measurement method for element contents has been developed by means of optical emission spectrometry (ICP OES) by which uncertainties between 0.1 and 0.05% can be achieved. The dissemination to field laboratories is effected with the aid of a calibration laboratory of the German Calibration Service (DKD) which certifies the element content of the secondary solutions with an uncertainty ≤ 0.3%. Calibration with these solutions enables the user to establish traceability of his measurement results to the International System of Units (SI). Currently, the system comprises Cu, Fe, Bi, Ga, Si, Na, K, Sn, W, and Pb. |
