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Abstract

Metrological traceability of measurement results provides the comparability needed for reliable measurement in almost every aspect of our daily life, ranging from fundamental science, through health and safety to global trade. From the authorrsquos (a physicist) perspective and understanding of recent literature, measurements in chemistry compare the ldquoamount of analyterdquo, are often made ldquoindirectlyrdquo, are sometimes ldquonot fully traceable to the SIrdquo, and metrological traceability is perhaps ldquonot always the major concern of the practising analytical chemistrdquo. The present article examines which of these views are typically ldquochemicalrdquo, and which are common to both the physicist and the chemist. Much can be gained by formulating a common understanding of basic concepts of traceability of measurement results in meeting ever-increasing demands for comparability of measurement results in both traditional as well as new areas of technology and societal concern.

Keywords  Measurement - Traceability - Comparability - Chemistry - Physics

Based on a lecture given by the author at a mini-symposium ldquoEmerging issues in metrology in chemistryrdquo organised by the IUPAC Analytical Chemistry Division and IUPAC Working Party for Harmonisation of Quality Assurance at IAEA Headquarters, Vienna, 17th February 2004.

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