1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 14211:2012Ambient air Standardmethod for the measurementof the concentration ofnitrogen dioxide andnitrogen monoxide bychemiluminescenceBS EN 14211:2012 BRITISH STANDARDNat
2、ional forewordThis British Standard is the UK implementation of EN 14211:2012. Itsupersedes BS EN 14211:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/2/3, Ambient atmospheres.A list of organizations represented on this committee can beobtained
3、 on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69297 0ICS 13.040.20Compliance with a Br
4、itish Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2012.Amendments issued since publicationDate Text affectedBS EN 14211:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NOR
5、M EN 14211 August 2012 ICS 13.040.20 Supersedes EN 14211:2005English Version Ambient air - Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence Air ambiant - Mthode normalise pour le mesurage de la concentration en dioxyde dazote et
6、monoxyde dazote par chimiluminescence Luftqualitt - Messverfahren zur Bestimmung der Konzentration von Stickstoffdioxid und Stickstoffmonoxid mit Chemilumineszenz This European Standard was approved by CEN on 10 May 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whic
7、h stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This Eur
8、opean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members a
9、re the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, R
10、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any mean
11、s reserved worldwide for CEN national Members. Ref. No. EN 14211:2012: EBS EN 14211:2012EN 14211:2012 (E) 2 Contents Contents . 2Foreword 41 Scope 52 Normative references 63 Terms and definitions 64 Abbreviated terms . 115 Principle 115.1 General 115.2 Measuring principle . 115.3 Type approval test
12、. 125.4 Field operation and quality control 126 Sampling . 136.1 General 136.2 Sampling location 136.3 Sampling system 136.4 Control and regulation of sample flow rate . 146.5 Sampling pump for the manifold 157 Analyser equipment . 157.1 General 157.2 Converter 157.3 Ozone generator. 167.4 Reaction
13、chamber 167.5 Optical filter 167.6 Detector . 167.7 Ozone removal device . 167.8 Sampling pump for the analyser 167.9 Particle filter . 168 Type approval of nitrogen dioxide and nitrogen monoxide analysers 168.1 General 168.2 Relevant performance characteristics and performance criteria . 178.3 Desi
14、gn change 198.4 Procedures for determination of the performance characteristics during the laboratory test . 208.5 Determination of the performance characteristics during the field test 328.6 Type approval and uncertainty calculation . 359 Field operation and ongoing quality control . 369.1 General
15、369.2 Suitability evaluation . 369.3 Initial installation 389.4 Ongoing quality assurance/quality control . 399.5 Calibration of the analyser 419.6 Checks 439.7 Maintenance . 489.8 Data handling and data reports 489.9 Measurement uncertainty . 4910 Expression of results 4911 Test reports and documen
16、tation 5011.1 Type approval test . 5011.2 Field operation . 51BS EN 14211:2012EN 14211:2012 (E) 3 Annex A (normative) Test of lack of fit . 53Annex B (informative) Sampling equipment. 55Annex C (informative) Types of chemiluminescence analysers 57Annex D (informative) Manifold testing 60Annex E (nor
17、mative) Type approval 62Annex F (informative) Calculation of uncertainty in field operation at the hourly limit value 81Annex G (informative) Calculation of uncertainty in field operation at the annual limit value . 89Annex H (informative) Significant technical changes . 99Bibliography 100BS EN 1421
18、1:2012EN 14211:2012 (E) 4 Foreword This document (EN 14211:2012) has been prepared by Technical Committee CEN/TC 264 “Air quality”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endor
19、sement, at the latest by February 2013, and conflicting national standards shall be withdrawn at the latest by February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for ide
20、ntifying any or all such patent rights. This document supersedes EN 14211:2005. The technical changes made since EN 14211:2005 are listed in Annex H of this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound
21、 to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
22、 Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14211:2012EN 14211:2012 (E) 5 1 Scope This European Standard specifies a continuous measurement method for the determination of the concentrations of nitrogen dioxide and nitrogen monoxide present in ambie
23、nt air based on the chemiluminescence measuring principle. This standard 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 o
24、f 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 concentration of nitrogen dio
25、xide present in ambient air up to 500 g/m3. This concentration range represents the certification range for NO2for the type approval test. The method is applicable to the determination of the concentration of nitrogen monoxide present in ambient air up to 1 200 g/m3. This concentration range represe
26、nts the certification range for NO for the type approval test. NOTE 1 It is possible to use other ranges depending on the levels present in ambient air. NOTE 2 When this European Standard is used for other purposes than for measurements required by Directive 2008/50/EC, the ranges and uncertainty re
27、quirements may not apply. 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 and locations influenced by industrial sources. The results are expressed
28、in g/m3(at 20 C and 101,3 kPa). NOTE 3 500 g/m3 of NO2corresponds to 261 nmol/molof NO2at 20 C and 101,3 kPa. 1 200 g/m3 of NO corresponds to 962 nmol/mol of NO 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
29、 information about the principles of NOxmeasurement by chemiluminescence analyser and sampling equipment. Clause 8 and Annex E are specifically directed towards test houses and laboratories that perform type-approval testing of NOxanalysers. These sections contain information about: Type-approval te
30、st 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 NOxanalyser based on the type-approval test results. Clauses 9 to 11 and Annexes F and G are directed
31、 towards monitoring networks performing the practical measurements of NOxin 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 measuremen
32、t results; Evaluation of the uncertainty of measurement results under practical monitoring conditions. BS EN 14211:2012EN 14211:2012 (E) 6 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For d
33、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 15267-1, Air quality Certification of automated measuring systems Part 1: General principles EN 15267-2, Air quality Certification of automate
34、d measuring systems Part 2: Initial assessment of the AMS manufacturers quality management system and post certification surveillance for the manufacturing process EN ISO 6142, Gas analysis Preparation of calibration gas mixtures Gravimetric method (ISO 6142) EN ISO 6143, Gas analysis Comparison met
35、hods for determining and checking the composition of calibration gas mixtures (ISO 6143) EN ISO 6144, Gas analysis Preparation of calibration gas mixtures Static volumetric methods (ISO 6144) EN ISO 6145-6, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 6:
36、 Critical orifices (ISO 6145-6) EN ISO 6145-7, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 7: Thermal mass-flow controllers (ISO 6145-7) EN ISO 6145-10, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 10: Perme
37、ation method (ISO 6145-10) EN ISO 14956, Air quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956) EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025) ENV 13005:
38、1999, Guide to the expression of uncertainty in measurement 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 adjustment set of operations carried out on a measuring system so that it provides prescribed indications corresponding to given value
39、s of a quantity to be measured Note 1 to entry: Types of adjustment of a measuring system include zero adjustment of a measuring system, offset adjustment, and span adjustment (sometimes called gain adjustment). Note 2 to entry: Adjustment of a measuring system should not be confused with calibratio
40、n, which is a prerequisite for adjustment. SOURCE: JCGM 200:2012 (VIM) 2 Note 3 to entry: In the context of this standard, adjustment is generally performed on measurement data rather than on the analyser. BS EN 14211:2012EN 14211:2012 (E) 7 3.2 ambient air outdoor air in the troposphere, excluding
41、workplaces as defined by Directive 89/654/EEC, where provisions concerning health and safety at work apply and to which members of the public do not have regular access SOURCE: Council Directive 2008/50/EC 1 3.3 analyser measuring system that provides an output signal which is a function of the conc
42、entration, partial pressure, flow or temperature of one or more components of a gas mixture 3.4 availability of the analyser fraction of the time period for which valid measuring data of the ambient air concentration is available from an analyser 3.5 calibration operation that, under specified condi
43、tions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a mea
44、surement result from an indication Note 1 to entry: A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measureme
45、nt uncertainty. Note 2 to entry: Calibration should not be confused with adjustment of a measuring system, often mistakenly called “self-calibration”, nor with verification of a calibration. Note 3 to entry: Often, the first step alone in the above definition is perceived as being calibration. SOURC
46、E: JCGM 200:2012 (VIM) 2 Note 4 to entry: In the context of this standard, calibration is a comparison of the analyser response to a known gas concentration with a known uncertainty when the information obtained from the comparison is used for the successive adjustment (if needed) of the analyser. 3
47、.6 certification range concentration range for which the analyser is type-approved 3.7 check verification that the analyser is still operating within specified performance limits 3.8 combined standard uncertainty standard uncertainty of the result of a measurement when that result is obtained from t
48、he values of a number of other quantities, equal to the positive square root of a sum of terms, the terms being the variances or co-variances of these other quantities weighted according to how the measurement result varies with changes in these quantities SOURCE: ENV 13005:1999 3.9 converter effici
49、ency degree of conversion of NO2present in the sample gas into NO, given as a percentage BS EN 14211:2012EN 14211:2012 (E) 8 3.10 coverage factor numerical factor used as a multiplier of the combined standard uncertainty in order to obtain an expanded uncertainty SOURCE: ENV 13005:1999 3.11 designat
