This European Standard specifies a continuous measurement method for the determination of the concentrations of ozone present in ambient air based on the ultraviolet photometric measuring principle. This standard describes the performance characteristics and sets the relevant minimum criteria required to select an appropriate ultraviolet photometric analyser by means of type approval tests. It also includes the evaluation of the suitability of an analyser for use in a specific fixed site so as to meet the data quality requirements as specified in Annex I of Directive 2008/50/EC and requirements during sampling, calibration and quality assurance for use. The method is applicable to the determination of the concentration of ozone present in ambient air up to 500 μg/m3. This concentration range represents the certification range for ozone for the type approval test. NOTE 1 Other ranges may be used for measurement systems applied at rural locations monitoring ecosystems. NOTE 2 When the standard is used for other purposes than Directive 2008/50/EC, the ranges and uncertainty requirements may not apply. The method covers the determination of ambient air concentrations of ozone in zones classified as rural areas, urban and urban-background areas. The results are expressed in μg/m3 (at 20 ℃ and 101,3 kPa). NOTE 3500 μg/m3 of O3 corresponds to 250 nmol/mol of O3 at 20 ℃ and 101,3 kPa. This standard contains information for different groups of users. Clauses 5 to 7 and Annexes B and C contain general information about the principles of ozone measurement by ultraviolet photometric analyser and sampling equipment. Clause 8 and Annex E are specifically directed towards test houses and laboratories that perform type-approval testing of ozone analysers. These sections contain information about: type-approval test conditions, test procedures and test requirements; analyser performance requirements; evaluation of the type-approval test results; evaluation of the uncertainty of the measurement results of the ozone analyser based on the type-approval test results. Clauses 9 to 11 and Annexes F and G are directed towards monitoring networks performing the practical measurements of ozone in ambient air. These sections contain information about: initial installation of the analyser in the monitoring network and acceptance testing; ongoing quality assurance/quality control; calculation and reporting of measurement results; evaluation of the uncertainty of measurement results under practical monitoring conditions.
EN 14625:2012 Referenced Document
EN 15267-1 Air quality - Assessment of air quality monitoring equipment - Part 1: General principles of certification*， 2023-05-31 Update
EN 15267-2 Air quality - Assessment of air quality monitoring equipment - Part 2: Initial assessment of the manufacturer’s quality management system and post certification surveillance for the manufacturing process*， 2023-05-31 Update
EN ISO 14956 Air quality - Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty ISO 14956: 2002
EN ISO 6145-6 Gas analysis - Preparation of calibration gas mixtures using dynamic methods - Part 6: Critical flow orifices*， 2017-08-01 Update
EN ISO 6145-7 Gas analysis - Preparation of calibration gas mixtures using dynamic methods - Part 7: Thermal mass-flow controllers*， 2018-12-01 Update
EN ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories*， 2017-12-01 Update
ISO 13964:1998 Air quality - Determination of ozone in ambient air - Ultraviolet photometric method
EN 14625:2012 history
2012EN 14625:2012 Ambient air - Standard method for the measurement of the concentration of ozone by ultraviolet photometry
2005EN 14625:2005 Ambient air quality - Standard method for the measurement of the concentration of ozone by ultraviolet photometry