1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 25139:2011Stationary source emissions Manual method for the determination of the methane concentration using gas chromatography (ISO 25139:2011)BS EN ISO 25139:2011 BRI
2、TISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 25139:2011.The UK participation in its preparation was entrusted to Technical Committee EH/2/1, Stationary source emission.A list of organizations represented on this committee can be obtained on request to its se
3、cretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 66213 3 ICS 13.040.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was
4、 published under the authority of the Standards Policy and Strategy Committee on 31 May 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 25139 April 2011 ICS 13.040.40 English Version Stationary source emissions - Manual method for th
5、e determination of the methane concentration using gas chromatography (ISO 25139:2011) missions de sources fixes - Mthode manuelle pour la dtermination de la concentration en mthane par chromatographie en phase gazeuse (ISO 25139:2011) Emissionen aus stationren Quellen - Manuelles Verfahren zur Best
6、immung der Methan-Konzentration mit Gaschromatographie (ISO 25139:2011) This European Standard was approved by CEN on 14 April 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national sta
7、ndard 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 European Standard exists in three official versions (English, French, German). A version in
8、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 are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
9、public, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN
10、DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 25139:2011: EBS EN ISO 25139:2011 EN ISO 25139:2011 (E) 3 Foreword This d
11、ocument (EN ISO 25139:2011) 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 Standard shall be given the status of a national standard, either by publication of
12、an identical text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. 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
13、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 European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, E
14、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 25139:2011 has been approved by
15、CEN as a EN ISO 25139:2011 without any modification. BS EN ISO 25139:2011ISO 25139:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Symbols and abbreviated terms 2 5 Principle . 3 6 Equipment 4 6.1 Sam
16、pling system . 4 6.2 Analytical apparatus . 6 7 Measurement procedure . 6 7.1 General . 6 7.2 Sampling 6 7.3 Analytical determination . 8 7.4 Interferents . 8 8 Calculation of the results . 8 9 Quality assurance and quality control procedures . 10 9.1 General . 10 9.2 Criteria and frequency of check
17、s . 10 9.3 Performing the checks 11 9.4 Check of the measurement system . 12 10 Performance characteristics 12 11 Test report 12 Annex A (normative) Operational gases 13 Annex B (normative) Quality assurance and quality control procedures 14 Annex C (informative) Typical performance characteristics
18、16 Bibliography 18 BS EN ISO 25139:2011ISO 25139:2011(E) iv ISO 2011 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
19、through ISO technical committees. Each 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 coll
20、aborates closely with the International 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 St
21、andards. Draft International Standards 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
22、of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 25139 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 1, Stationary source emissions. BS EN ISO 25139:2011ISO 25139:2011(E) ISO 2011
23、 All rights reserved vIntroduction Methane (CH4) is a gas of relevance to the climate (“greenhouse gas”) and contributes directly to the atmospheric greenhouse effect. The emissions of methane originate from natural sources and those due to human activity. Significant sources are, for example, cattl
24、e breeding, cultivation of rice, extraction and transport of natural gas, and landfills. Other important sources contributing to emissions of methane are, for example, composting plants, the use of biogas and natural gas, and biomass firings. This International Standard specifies a method of measure
25、ment for the determination of methane emissions from stationary sources. BS EN ISO 25139:2011BS EN ISO 25139:2011INTERNATIONAL STANDARD ISO 25139:2011(E) ISO 2011 All rights reserved 1Stationary source emissions Manual method for the determination of the methane concentration using gas chromatograph
26、y 1 Scope This International Standard specifies a manual method for the determination of the concentration of methane emissions from stationary sources. This International Standard specifies an independent method of measurement, which is validated for mass concentrations up to 1 500 mg/m3. NOTE 1 An
27、 independent method of measurement is used for such purposes as calibration or validation of permanently installed measuring systems. NOTE 2 An “independent method of measurement” is termed “standard reference method (SRM)” in EN 141815. 2 Normative references The following referenced documents are
28、indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9169, Air quality Definition and determination of performance characteristics of an
29、automatic measuring system EN 15267-3, Air quality Certification of automated measuring systems Part 3: Performance criteria and test procedures for automated measuring systems for monitoring emissions from stationary sources 3 Terms and definitions For the purposes of this document, the following t
30、erms and definitions apply. 3.1 reference gas air quality gas of known, reliable and stable composition NOTE In the context of this International Standard, a reference gas is used to calibrate the gas chromatograph. 3.2 interferent interfering substance air quality substance present in the air mass
31、under investigation, other than the measurand, that affects the response ISO 9169:2006, 2.1.12 BS EN ISO 25139:2011ISO 25139:2011(E) 2 ISO 2011 All rights reserved3.3 mass concentration stationary source emissions concentration of a substance in an emitted waste gas expressed as mass per volume NOTE
32、 Mass concentration is often expressed in milligrams per cubic metre. ISO 25140:20103, 3.14 3.4 uncertainty (of measurement) parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand ISO/IEC Guide 98-3
33、:20084, 2.2.3 3.5 standard uncertainty uncertainty of the result of a measurement expressed as a standard deviation ISO/IEC Guide 98-3:20084, 2.3.1 4 Symbols and abbreviated terms AMS automatic measuring system FID flame ionization detector FKM fluoro rubber GC gas chromatograph PE polyethylene PET
34、poly(ethylene terephthalate) PLOT porous layer open tubular PTFE polytetrafluoroethylene QA/QC quality assurance and quality control A peak area ejresidual at mass concentration level jfGCGC calibration factor k slope of the calibration line L limit of detection 2HO,vm mass of water vapour 4CHM mole
35、cular mass of methane (16 g/mol) BS EN ISO 25139:2011ISO 25139:2011(E) ISO 2011 All rights reserved 32HOM molecular mass of water (18 g/mol) n number of measurements srrepeatability standard deviation SGCGC signal SGC,calGC signal in response to the reference gas applied V0volume of the dry gas samp
36、led Vmstandard molar volume (22,4 l/mol) xiithmeasured value x average of the measured values xijx average of the measured values at mass concentration level j4CH ,s methane mass concentration at standard conditions of temperature and pressure 420CH ,(H O) methane mass concentration at reference con
37、ditions of water vapour (dry gas) 42CH ,O methane mass concentration at reference conditions of oxygen jjth mass concentration level 2HO,v density of water vapour 4CH ,cal methane content, as a volume fraction, of the reference gas applied during calibration 4CH ,o methane content, as a volume fract
38、ion, at operating conditions 2HO water vapour content, as a volume fraction, in the waste gas 2O,m measured oxygen content, as a volume fraction, in the waste gas 2O,ref reference oxygen content, as a volume fraction 5 Principle The sample gas is extracted from the waste gas duct via a sampling syst
39、em and pumped into a gas-sampling bag or canister. A portion of the sample is taken off from the gas-sampling bag or canister and introduced into a gas chromatographic system. After separation on a packed or capillary column, methane is determined by means of a flame ionization detector. BS EN ISO 2
40、5139:2011ISO 25139:2011(E) 4 ISO 2011 All rights reserved6 Equipment 6.1 Sampling system The sampling system shall allow for the extraction of the sample gas from the waste gas duct. It consists in principle of: sampling probe; particle filter; sample gas cooler; sample gas flow meter; sample gas pu
41、mp; vacuum pump, if necessary; gas-sampling vessel (bag, glass tube or canister), or direct sampling loop to the GC. Several sampling techniques are suitable such as: use of gas-sampling bags with upstream pump (see Figure 1); use of evacuated gas-sampling vessels made of glass or canisters made of
42、corrosion-resistant materials (e.g. stainless steel) with upstream pump (see Figure 2); use of the “lung principle” with the gas-sampling bag placed in an evacuated container; use of a sampling system as shown in Figure 1 but with the gas-sampling bag replaced by a sampling line directly connected t
43、o the loop sampling system of the GC. 58432167 9Key 1 sampling probe, heated (if necessary) 6 flow meter 2 valve for introducing test gases 7 bypass valve for purging the sampling system 3 particle filter, heated 8 sampling bag valve 4 sample gas cooler or permeation dryer 9 gas-sampling bag 5 sampl
44、e gas pump Figure 1 Example of a sampling system with gas-sampling bag BS EN ISO 25139:2011ISO 25139:2011(E) ISO 2011 All rights reserved 5843211012695711Key 1 sampling probe, heated (if necessary) 7 throttle element 2 valve for introducing test gases 8 shut-off valve 3 particle filter, heated 9 gas
45、-sampling vessel or canister 4 sample gas cooler or permeation dryer 10 temperature and pressure measuring device 5 control valve 11 shut-off valve 6 sample gas pump 12 vacuum pump (if necessary) Figure 2 Example of a sampling system with evacuated gas-sampling vessel The sampling line shall be as s
46、hort as possible. The sampling line shall be installed so as to descend to the cooler. Condensation shall be avoided at any point of the sampling system. The sampling system shall meet the following requirements: the sampling probe shall be a tube made of stainless steel or glass, which can be heate
47、d to 150 C, if necessary, equipped with a device (e.g. a valve) for introducing test gases; the dust filter shall be a quartz fibre or ceramic filter in a filter housing and shall be heatable to 150 C, if necessary; the sampling line shall be made of stainless steel or polytetrafluoroethylene (PTFE)
48、 and shall be heatable to 150 C, if necessary; the sample gas cooler or permeation dryer shall be suitable for a flow rate up to 1 l/min; the sample gas pump shall be gas-tight with adjustable flow rate (up to 1 l/min), and shall be heatable, if necessary; vacuum pump for evacuating the gas-sampling
49、 vessel down to a residual pressure of 10 hPa to 20 hPa; connecting pieces for components of the sampling apparatus shall be made of an inert tubing material, e.g. PTFE or fluoro rubber (FKM); the flow meter with control valve shall be suitable for measuring the sampling flow rate; the gas-sampling vessel shall be gas-tight (e.g. a plastic bag with closable filler nozzle or canister of corrosion-resistant materials equipped with valves) with a volume of 5 l
