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1673441 
Journal Article 
Type approval of instruments and uncertainty calculations in the new EN-standards for the measurement of SO2, NO2,CO and O-3 in ambient air 
Sneek, EJ 
2003 
Yes 
Gefahrstoffe, Reinhaltung der Luft / Air Quality Control
ISSN: 0949-8036
EISSN: 1436-4891 
63 
4 
163-166 
WOS:000182883100010 
The new European directives for ambient air quality ore setting data quality objectives for the measurement of air polluting compounds. On request of the European Commission a working group of CEN 264 "Air quality" has developed standards with which these data quality objectives could be realised. Next to the measurement method itself, sampling procedure and quality assurance and quality control, these standards are dealing with type approval tests of instruments and uncertainty calculations of measurement data. Explanation is given about some of the considerations for the choices made by the working group in developing the requirements for performance characteristics, in developing the test methods to establish the values of these performance characteristics and in developing the uncertainty calculations.