1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 21258:2010Stationary source emissions Determination of themass concentration ofdinitrogen monoxide (N2O) Reference method: Non-dispersive infrared method(ISO 21258:2010
2、)BS EN ISO 21258:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO21258:2010.The UK participation in its preparation was entrusted to TechnicalCommittee EH/2/1, Stationary source emission.A list of organizations represented on this committee can beobtaine
3、d on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 57898 4ICS 13.040.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2010Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21258 June 2010 ICS 13.040.40 English Version Stationary source emissions - Determ
5、ination of the mass concentration of dinitrogen monoxide (N2O) - Reference method: Non-dispersive infrared method (ISO 21258:2010) missions de sources fixes - Dtermination de la concentration massique de protoxyde dazote (N2O) - Mthode de rfrence: Mthode infrarouge non dispersive (ISO 21258:2010) Em
6、issionen aus stationren Quellen - Bestimmung der Massenkonzentration von Distickstoffmonoxid (N2O) - Referenzverfahren: Nicht-dispersives Infrarot-Verfahren (ISO 21258:2010) This European Standard was approved by CEN on 19 May 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regul
7、ations 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 CEN Management Centre or to any CEN member. This
8、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 Management Centre has the same status as the official versions. CEN members are th
9、e national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
10、witzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.
11、No. EN ISO 21258:2010: EBS EN ISO 21258:2010EN ISO 21258:2010 (E) 3 Foreword This document (EN ISO 21258:2010) has been prepared by Technical Committee ISO/TC 146 “Air quality“ in collaboration with Technical Committee CEN/TC 264 “Air quality” the secretariat of which is held by DIN. This European S
12、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2010, and conflicting national standards shall be withdrawn at the latest by December 2010. Attention is drawn to the possibility that some of the element
13、s of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europ
14、ean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and th
15、e United Kingdom. Endorsement notice The text of ISO 21258:2010 has been approved by CEN as a EN ISO 21258:2010 without any modification. BS EN ISO 21258:2010ISO 21258:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and defini
16、tions .1 4 Symbols and abbreviated terms 5 5 Principle6 6 Description of the automated measuring equipment6 6.1 General .6 6.2 Sampling line components.7 6.3 Analyser equipment 8 6.4 Responsibilities .8 7 Performance criteria and determination of the performance characteristics.9 7.1 Performance cri
17、teria9 7.2 Determination of the performance characteristics and measurement uncertainty .10 7.3 Establishment of the uncertainty budget10 8 Measurement procedure.11 8.1 Sampling location11 8.2 Sampling point(s) 11 8.3 Choice of the measuring system .11 8.4 Setting of the analyser on site .12 9 Ongoi
18、ng quality control13 9.1 General .13 9.2 Frequency of checks.13 10 Evaluation of the method in the field 14 11 Expression of results14 12 Test report15 Annex A (informative) Schematic diagram of a typical analyser .16 Annex B (normative) Procedures for determination of the performance characteristic
19、s during the general performance test17 Annex C (informative) Example of assessment of compliance of NDIR method for N2O with requirements on emission measurements .20 Annex D (informative) Results of comparison tests27 Annex E (informative) Leak test procedures30 Bibliography32 BS EN ISO 21258:2010
20、ISO 21258:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each
21、member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
22、 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards
23、adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of
24、patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21258 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 1, Stationary source emissions. BS EN ISO 21258:2010ISO 21258:2010(E) ISO 2010 All rights reserved vIntroduction Dini
25、trogen monoxide (N2O, also known as nitrous oxide) is an important greenhouse gas with a global warming potential 310 times that of carbon dioxide (CO2). N2O is of both natural and anthropogenic origin. Increased emissions of N2O have been observed, for example, in the exhaust gas of combustion proc
26、esses using nitrogenous fuels at temperatures below 900 C, and in the reduction of NOxusing the selective non-catalytic reduction (SNCR) process, in particular when urea is used. There is considerable uncertainty over current N2O emissions, which is reflected in the wide range of emission factors ci
27、ted. The largest uncertainties are for emissions from natural and agricultural sources, which are difficult to measure accurately. In the past, emissions from stationary sources such as coal-fired plants and industry were overestimated due to a serious artefact in the grab-sampling methodology used
28、to measure emissions. N2O is involved in the EU emission trading scheme along with CO2and methane (CH4). Improved measurement techniques are helping to reduce uncertainties in emission estimates. Improved measurement techniques are also a prerequisite for accurate information on N2O and its potentia
29、l role in the enhanced greenhouse effect. BS EN ISO 21258:2010BS EN ISO 21258:2010INTERNATIONAL STANDARD ISO 21258:2010(E) ISO 2010 All rights reserved 1Stationary source emissions Determination of the mass concentration of dinitrogen monoxide (N2O) Reference method: Non-dispersive infrared method 1
30、 Scope This International Standard specifies a method for sampling, sample conditioning and determination of dinitrogen monoxide (N2O) content in the flue gas emitted from ducts and stacks to atmosphere. It sets out the non-dispersive infrared (NDIR) analytical technique, including the sampling syst
31、em and sample gas conditioning system. This International Standard is a reference method for periodic monitoring and for calibration, adjustment or control of automatic monitoring systems permanently installed on a stack. This reference method has been successfully tested on a sewage sludge incinera
32、tor where the N2O concentration in the flue gas was up to about 200 mg/m3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referen
33、ced document (including any amendments) applies. ISO 9169:2006, Air quality Definition and determination of performance characteristics of an automatic measuring system ISO 14956, Air quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertain
34、ty 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 influence quantity quantity that is not the measurand but that aff
35、ects the result of the measurement ISO/IEC Guide 98-3:2008, B.2.10 3.2 interference negative or positive effect upon the response of the measuring system, due to a component of the sample that is not the measurand BS EN ISO 21258:2010ISO 21258:2010(E) 2 ISO 2010 All rights reserved3.3 interferent in
36、terfering substance substance present in the air mass under investigation, other than the measurand, that affects the response ISO 9169:2006, 2.1.12 3.4 lack of fit systematic deviation within the range of application between the measurement results obtained by applying the calibration function to t
37、he observed response of the measuring system measuring reference materials and the corresponding accepted value of such reference materials NOTE 1 Lack of fit may be a function of the measurement result. ISO 9169:2006, 2.2.9 NOTE 2 The expression “lack of fit” is often replaced in everyday language
38、for linear relations by “linearity” or “deviation from linearity”. 3.5 measurand particular quantity subject to measurement ISO/IEC Guide 98-3:2008, B.2.9 3.6 performance characteristic one of the quantities assigned to equipment in order to define its performance NOTE Performance characteristics ca
39、n be described by values, tolerances, or ranges. 3.7 reference gas gaseous mixture of stable composition used to calibrate the reference measuring system and which is traceable to national or international standards 3.8 reference method measurement method taken as a reference by convention, which gi
40、ves the accepted reference value of the measurand 3.9 repeatability in the laboratory precision under repeatability conditions in the laboratory NOTE 1 Repeatability can be expressed quantitatively in terms of the dispersion characteristics of the results. In this International Standard, the repeata
41、bility is expressed as a value with a level of confidence of 95 %. NOTE 2 Adapted from ISO 3534-2:20061, 3.3.5. 3.10 repeatability conditions in the laboratory observation conditions where independent test results are obtained with the same method on identical test items in the same test or measurin
42、g facility by the same operator using the same equipment within short intervals of time in the laboratory NOTE 1 Repeatability conditions in the laboratory include: the same measurement procedure at the same laboratory; BS EN ISO 21258:2010ISO 21258:2010(E) ISO 2010 All rights reserved 3 the same op
43、erator; the same measuring instrument used under the same conditions; the same location; repetition over a short period of time. NOTE 2 Adapted from ISO 3534-2:20061, 3.3.6. 3.11 repeatability in the field precision under repeatability conditions in the field NOTE 1 Repeatability can be expressed qu
44、antitatively in terms of the dispersion characteristics of the results. In this International Standard the repeatability under field conditions is expressed as a value with a level of confidence of 95 %. NOTE 2 Adapted from ISO 3534-2:20061, 3.3.5. 3.12 repeatability conditions in the field observat
45、ion conditions where independent test results are obtained with the same method on identical test items in the same test or measuring facility by the same operator using the same equipment within short intervals of time in the field NOTE 1 Repeatability conditions in the field include: the same meas
46、urement procedure; two sets of equipment, the performance of which fulfils the requirements of the reference method, used under the same conditions; the same location; implemented by the same laboratory; typically calculated on short periods of time in order to avoid the effect of changes of influen
47、ce parameters. NOTE 2 Adapted from ISO 3534-2:20061, 3.3.6. 3.13 reproducibility in the field precision under reproducibility conditions in the field NOTE 1 Reproducibility in the field can be expressed quantitatively in terms of the dispersion characteristics of the results. In this International S
48、tandard the reproducibility under field conditions is expressed as a value with a level of confidence of 95 %. NOTE 2 Adapted from ISO 3534-2:20061, 3.3.10. NOTE 3 Results are usually understood to be corrected results. 3.14 reproducibility conditions in the field observation conditions where indepe
49、ndent test results are obtained with the same method on identical test items in different test or measurement facilities with different operators using different equipment in the field NOTE 1 Reproducibility conditions in the field include: the same measurement procedure; BS EN ISO 21258:2010ISO 21258:2010(E) 4 ISO 2010 All rights reserved several sets of equipment, the performance of which fulfils the requirements of the reference method, used under the same conditions; the same location; i
