BS EN 14625:2012 - Ambient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry

BS EN 14625:2012

Ambient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry

Status : Current, Under review   Published : September 2012

Format
PDF

Format
HARDCOPY



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 [1] and requirements during sampling, calibration and quality assurance for use. The method is applicable to the determination of the con¬centration 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 depending on the levels present in ambient air. NOTE 2 When the standard is used for other purposes than for measurements required by Directive 2008/50/EC, the ranges and uncertainty requirements may not apply. The method covers the determination of ambient air concentrations of ozone in areas classified as rural, urban and urban-background areas. The results are expressed in µg/m3 (at 20 ?C and 101,3 kPa). NOTE 3 500 µg/m3 of O3 corresponds to 250 nmol/mol of O3 at 20 ?C 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.




Standard NumberBS EN 14625:2012
TitleAmbient air. Standard method for the measurement of the concentration of ozone by ultraviolet photometry
StatusCurrent, Under review
Publication Date30 September 2012
Confirm Date07 March 2018
Normative References(Required to achieve compliance to this standard)ISO 6145-7, ISO 6145-6:2017, ISO 13964:1998, ISO 14956, EN ISO 14956, EN ISO 6145-6, EN 15267-1, ISO/IEC 17025, EN ISO 6145-7,

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