Ambient air - Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence; German version EN 14211:2012
German title
Außenluft - Messverfahren zur Bestimmung der Konzentration von Stickstoffdioxid und Stickstoffmonoxid mit Chemilumineszenz; Deutsche Fassung EN 14211:2012
Publication date
2012-11
Original language
German
Pages
101
Publication date
2012-11
Original language
German
Pages
101
DOI
https://dx.doi.org/10.31030/1852617
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Short description
This document specifies a continuous measurement method for the determination of the concentrations of nitrogen dioxide and nitrogen monoxide present in ambient air based on the chemiluminescence measuring principle. This document describes the performance characteristics and sets the relevant minimum criteria required to select an appropriate chemiluminescence 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 of the relevant EU air quality directive and the requirements during sampling, calibration and quality assurance. The method is applicable to the determination of the concentration of nitrogen dioxide present in ambient air from 0 µg/m3 to 500 µg/m3 and to the determination of the concentration of nitrogen monoxide present in ambient air from 0 µg/m3 to 1 200 µg/m3. These concentration ranges represent the certification ranges for the type approval test. The method covers the determination of ambient air concentrations of nitrogen dioxide and nitrogen monoxide in zones classified as rural areas, urban-background areas and traffic-orientated locations. When the standard is used for other purposes than for measurements required by EU Directives, the range and uncertainty requirements need not apply.
Overview
This standard specifies an automated measurement method for the continuous determination of the concentrations of nitrogen dioxide and nitrogen monoxide present in ambient air based on the chemiluminescence measuring principle. This method is also the reference method for measurements in connection with Directive 2008/50/EC on ambient air quality and cleaner air for Europe. For this reason the standard contains the minimum criteria required to select an appropriate chemiluminescence analyser by means of type approval tests and the evaluation of the suitability of an analyser for use in a specific fixed site (rural areas, urban-background areas and traffic-orientated locations) so as to meet the data quality requirements as specified in the EU Directive. The method is applicable to the determination of the concentration of nitrogen dioxide up to 500 µg/m3 and of nitrogen monoxide up to 1 200 µg/m3. Both concentration ranges represent the certification ranges for the type approval test. The standard contains information for different groups of users: a) general information about the principles of NOx measurement by chemiluminescence analyser and sampling equipment. b) information for test houses and laboratories that perform type-approval testing of automated analysers: - test conditions, test procedures and test requirements; - minimum criteria required to select an analyser; - evaluation of the test results; - establishment and evaluation of the measurement uncertainty. c) information for air quality monitoring networks: - 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 measurement uncertainty under practical monitoring conditions. As a result, this standard gains considerable importance for manufacturers of analysers. This standard is the European-wide foundation for uniform measurement of air quality in relation to the NOx concentration.
Please get in touch with the relevant contact person at DIN if you have problems understanding the content of the standard or need advice on how to apply it.