| Zugriffsnummer | 11892 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | How to achieve international comparability of chemical measurements |
| Autor(in); Institution |
Richter, Wolfgang; 3.2, Chemische Physik, PTB-Braunschweig
|
| Quelle/Jahr | Third Workshop The Status of Traceability in Chemical Measurement: proceedings:(1999), 64 - 68 |
| Herausgeber(in) |
EURACHEM
|
| Verlag | Bratislava: Slovak Institute of Metrology |
| Konferenzangaben | EURACHEM Third Workshop: The status of traceability in chemical measurement, Bratislava, 06-08, September, 1999, Slovakia |
| Freie Schlagworte | traceability ; national traceability systems ; international equivalence |
| Zusammenfassung | The central aim of current activities in metrology in chemistry is to create confidence in the reliability of chemical measurement results so that they are accepted without costly repetitions. An important prerequisite for confidence is comparability based on traceability to recognised common references, ideally the SI units. Since metrology is organised in national frameworks on the basis of national legislation a two-step procedure is required to achieve the international comparability of chemical measurements which is increasingly required due to globalisation of trade and industry: (1) establishment of national traceability structures for chemical measurements and (2) mutual recognition of the national traceability structures based on equivalence criteria. The first step is being done now in many countries. Examples are presented for Germany. The second step has been initiated by the Mutual Recognition Agreement (MRA) of national measurement standards of the Metre Convention which is based on international comparison measurements on the national standards level. Chemical analysis is included in this process through the Consultative Committee for Amount of Substance (CCQM). |
