1、BSI Standards PublicationBS EN 14662-3:2015Ambient air Standardmethod for the measurementof benzene concentrationsPart 3: Automated pumped sampling within situ gas chromatographyBS EN 14662-3:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14662-3:2015.It s
2、upersedes BS EN 14662-3:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/2/3, Ambient atmospheres.A list of organizations represented on this committee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 on request to its secretary.This publication does not purport to include all th
3、e necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 80852 4ICS 13.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standar
4、d was published under the authority of theStandards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 14662-3:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14662-3 November 2015 ICS 13.040.20 Supersedes EN 146
5、62-3:2005English Version Ambient air - Standard method for the measurement of benzene concentrations - Part 3: Automated pumped sampling with in situ gas chromatography Qualit de lair ambiant - Mthode normalise pour le mesurage de la concentration en benzne - Partie 3: Prlvement par pompage automati
6、que avec analyse chromatographique en phase gazeuse sur site Auenluft - Messverfahren zur Bestimmung von Benzolkonzentrationen - Teil 3: Automatische Probenahme mit einer Pumpe und gaschromatographische In-situ-Bestimmung This European Standard was approved by CEN on 17 July 2015. CEN members are bo
7、und to comply with the CEN/CENELEC Internal Regulations which 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
8、CEN-CENELEC Management Centre or to any CEN member. This European 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
9、 has the same status as the official versions. CEN members are 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,
10、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 B
11、russels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14662-3:2015 EBS EN 14662-3:2015EN 14662-3:2015 (E) 2 Contents Page European foreword . 4 1 Scope 5 2 Normative references 6 3 Terms and definitions . 6 4 Abbreviated ter
12、ms . 11 5 Principle 12 5.1 General . 12 5.2 Measuring principle 12 5.3 Type approval test . 13 5.4 Field operation and quality control. 14 6 Sampling equipment . 14 6.1 General . 14 6.2 Sampling location . 14 6.3 Sampling system . 14 6.4 Control and regulation of sample volume . 15 6.5 Sampling pump
13、 for the manifold 15 7 Analyser equipment 16 7.1 General . 16 7.2 Sampling trap 16 7.3 Sampling device 16 7.4 Thermal desorption unit . 16 7.5 Separation unit 16 7.6 Detector . 16 7.7 Data processing system . 17 8 Type approval of benzene analysers . 17 8.1 General . 17 8.2 Relevant performance char
14、acteristics and performance criteria 18 8.3 Design changes (EN 15267-1 and EN 15267-2) . 19 8.4 Procedures for determination of the performance characteristics during the laboratory test . 19 8.5 Determination of the performance characteristics during the field test. 27 8.6 Expanded uncertainty calc
15、ulation for type approval . 31 9 Field operation and ongoing quality control . 31 9.1 General . 31 9.2 Suitability evaluation 32 9.3 Initial installation 33 9.4 Ongoing quality assurance/quality control 34 9.5 Calibration of the analyser . 36 9.6 Checks . 37 9.7 Maintenance . 41 9.8 Data handling an
16、d data reports 41 9.9 Measurement uncertainty 42 10 Expression of results . 42 BS EN 14662-3:2015EN 14662-3:2015 (E) 3 11 Test reports and documentation 42 11.1 Type approval test 42 11.2 Field operation 44 Annex A (normative) Test of lack of fit 45 Annex B (informative) Sampling equipment 47 Annex
17、C (informative) Components and applications of benzene analysers . 48 Annex D (informative) Manifold testing equipment . 50 Annex E (normative) Type approval . 52 Annex F (informative) Calculation of uncertainty in field operation at the annual limit value 65 Bibliography . 72 BS EN 14662-3:2015EN 1
18、4662-3:2015 (E) 4 European foreword This document (EN 14662-3:2015) 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 en
19、dorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. 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 identifyin
20、g any or all such patent rights. This document supersedes EN 14662-3:2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports Essential Requirements of the Council Directive 2008/50/EC 1. Details of significant
21、 technical changes between this European Standard and the previous edition are: Clause 8 has been brought in line with other Standards dealing with type approval of gas analysers; In 9.4 and 9.6, performance requirements have been modified or removed and additional performance criteria and tests hav
22、e been introduced for repeatability at span level; In 9.5, formulae have been introduced for software adjustment of the raw analyser signal after calibration; In Annexes E and F, uncertainty calculations have been modified to be in conformity with EN ISO 14956. According to the CEN-CENELEC Internal
23、Regulations, the national standards organizations of the following countries are bound 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, Irelan
24、d, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14662-3:2015EN 14662-3:2015 (E) 5 1 Scope This European Standard specifies a semi-continuous measurement method for the
25、 determination of the concentration of benzene present in ambient air based on automated sampling and analysis by gas chromatography. This European Standard describes the performance characteristics and sets the relevant minimum criteria required to select an appropriate automated gas chromatograph
26、(GC) 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 f
27、or use. The method is applicable to the determination of the mass concentration of benzene present in ambient air in the range up to 50 g/m3benzene. This concentration range represents the certification range for the type approval test. Other ranges may be used depending on the levels present in amb
28、ient air. NOTE 1 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 benzene in zones classified as rural areas, urban-backgrou
29、nd areas and traffic-orientated locations and locations influenced by industrial sources. The results are expressed in g/m3(at 20 C and 101,3 kPa). NOTE 2 50 g/m3of benzene corresponds to 15,4 nmol/mol of benzene. This European Standard contains information for different groups of users. Clauses 5 t
30、o 7 and Annexes C and D contain general information about the principles of benzene measurement by automated gas chromatography and sampling equipment. Clause 8 and Annex E are specifically directed towards test houses and laboratories that perform type-approval testing of benzene analysers. These s
31、ections 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 benzene analyser based on the type-approval test r
32、esults. Clauses 9 to 11 and Annex F are directed towards monitoring networks performing the practical measurements of benzene in ambient air. These sections contain information about: initial installation of the analyser in the monitoring network and acceptance testing; ongoing quality assurance/qua
33、lity control; calculation and reporting of measurement results; evaluation of the uncertainty of measurement results under practical monitoring conditions. BS EN 14662-3:2015EN 14662-3:2015 (E) 6 2 Normative references The following documents, in whole or in part, are normatively referenced in this
34、document and are indispensable for its application. For dated 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 pri
35、nciples EN 15267-2, Air quality Certification of automated 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 m
36、ethod (ISO 6142) EN ISO 6143, Gas analysis Comparison methods for determining and checking the composition of calibration gas mixtures (ISO 6143) EN ISO 6144, Gas analysis Preparation of calibration gas mixtures Static volumetric method (ISO 6144) EN ISO 6145-4, Gas analysis Preparation of calibrati
37、on gas mixtures using dynamic volumetric methods Part 4: Continuous syringe injection method (ISO 6145-4) EN ISO 6145-6, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 6: Critical orifices (ISO 6145-6) EN ISO 6145-7, Gas analysis Preparation of calibration
38、 gas mixtures using dynamic volumetric methods Part 7: Thermal mass-flow controllers (ISO 6145-7) EN ISO 6145-8, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 8: Diffusion method (ISO 6145-8) EN ISO 6145-9, Gas analysis Preparation of calibration gas mixt
39、ures using dynamic volumetric methods Part 9: Saturation method (ISO 6145-9) EN ISO 6145-10, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 10: Permeation method (ISO 6145-10) EN ISO 14956, Air quality Evaluation of the suitability of a measurement procedu
40、re by comparison with a required measurement uncertainty (ISO 14956) ISO/IEC Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1
41、adjustment set of operations carried out on a measuring system so that it provides prescribed indications corresponding to given values 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 a
42、djustment (sometimes called gain adjustment). BS EN 14662-3:2015EN 14662-3:2015 (E) 7 Note 2 to entry: Adjustment of a measuring system should not be confused with calibration, which is a prerequisite for adjustment. Note 3 to entry: In the context of this European Standard, adjustment is performed
43、on measurement data rather than on the analyser. SOURCE: JCGM 200:2012 (VIM), Note 3 to entry has been modified, 2 3.2 ambient air outdoor air in the troposphere, excluding workplaces as defined by Directive 89/654/EEC where provisions concerning health and safety at work apply and to which members
44、of the public do not have regular access SOURCE: 2008/50/EC 1 3.3 analyser analytical instrument that provides an output signal which is a function of the concentration, partial pressure, flow or temperature of one or more components of a gas mixture 3.4 availability of the analyser fraction of the
45、total time period for which valid measuring data of the ambient air concentration is available from an analyser 3.5 calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement stand
46、ards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication Note 1 to entry: A calibration may be expressed by a statement, calibration function, calibration di
47、agram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measurement uncertainty. Note 2 to entry: Calibration should not be confused with adjustment of a measuring system, often mistakenly called “sel
48、f-calibration”, nor with verification of a calibration. SOURCE: JCGM 200:2012 (VIM), modified, 3rdnote has been deleted 3.6 carry-over (memory effect) influence of the previous measurement due to the retention of benzene within the instrument 3.7 certification range concentration range for which the
49、 analyser is type approved 3.8 check verification that the analyser is still operating within specified performance limits BS EN 14662-3:2015EN 14662-3:2015 (E) 8 3.9 combined standard uncertainty standard uncertainty of the result of a measurement when that result is obtained from the values of a number of other quantities, equal to the positive square root of a sum of terms, the terms being the variances or covariances of these other quantities weighted according to how the measureme
