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Climate and air quality are of fundamental interest worldwide.
Gas metrology provides profound solutions to measurement tasks on climate and air quality, e.g., when greenhouse gases or pollutants are to be quantified.
Metrological capabilities are demonstrated through participation in the framework of the CIPM Mutual Recognition Arrangement (CIPM MRA).
In Germany, this is covered by three institutes: Bundesanstalt für Materialforschung und -prüfung (BAM), Physikalisch-Technische Bundesanstalt (PTB), and Umweltbundesamt (UBA).
Together, the three laboratories realize the unit mole by means of the national gas standards and offer services to their customers that are backed-up by internationally accepted calibration and measurement capabilities (CMCs).
Measurements are an important fundament of natural science in general and of chemical analysis in particular. Metrology is the science (and art) of performing measurements. The basic concepts and terms of metrology and their practical implementation are introduced. The very special peculiarities of chemical measurements that are absent in physical measurements are discussed.