Traceability in measurement time for an update

Abstract The present international definition of traceability is discussed and suggestions are made for a possible refinement of the definition. 

Key words Traceability Metrology in chemistry Vocabulary in metrology 

Chemists in many parts of the world are increasingly using the language of measurement science (metrology). They express their measurements in a way that language is commonly used by physicists 

In a chapter on measurement standards (etalons) in the International Vocabulary of Basic and General Terms in Metrology (VIM), first published in 1993, traceability is as defined follows  

The unbroken chain of comparisons is called a traceable chain. 

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