In this short course on measurement uncertainty in gas analysis, the emphasis lay on calculations derived from analytical data. Such calculations played an important role in the transmission and distribution of energy gases, carbon dioxide and other commodities.

Evaluating measurement uncertainty was important, as there were usually legislative, regulatory and commercial requirements to be met. Assessing and demonstrating compliance with such requirements required knowledge of the uncertainty associated with the measurement result.

It was shown how the well-known law of propagation of uncertainty could be used with models for which it was not evident how to calculate partial derivatives, such as equations of state used to calculate, for example, compressibility factors, densities and energies.

Furthermore, it was shown how to calculate time averages from measurement data in grids and networks.

Adriaan van der Veen studied chemistry in Utrecht, the Netherlands, and obtained in his PhD in physical chemistry in 1997 at the same university. He has been working since 1994 at VSL, the Dutch National Metrology Institute, first as scientist, currently as chief scientist in Chemistry and Data Science & Modelling.

He is an expert in gas analysis, interlaboratory comparisons, reference materials, measurement uncertainty and standardisation. He has participated in various ISO committees since 1994 and led the development of several standards.

He is the past chairman of ISO/IC158 Analysis of gases and the chairman of  ISO/TC193 Natural gas and coordinator of the project “Metrology for smart metering in gas networks” (SmartGasNet) in the European Partnership of Metrology programme.