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1、BRITISH STANDARD BS EN ISO 6143:2006 Incorporating amendment no. 1 (renumbers BS ISO 6143:2001 as BS EN ISO 6143:2006) Gas analysis Comparison methods for determining and checking the composition of calibration gas mixtures The European Standard EN ISO 6143:2006 has the status of a British Standard
2、ICS 71.040.40 ? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN ISO 6143:2006 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was publi
3、shed under the authority of the Standards Committee and comes into effect on 15 August 2001 BSI 2007 ISBN 0 580 38068 8 National foreword This British Standard was published by BSI. It is the UK implementation of EN ISO 6143:2006. It is identical with ISO 6143:2001. It supersedes BS 4559-9.1:1988 wh
4、ich is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PTI/15, Natural gas and gas analysis. A list of organizations represented on PTI/15 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of
5、 a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments 1690428 February 2007 Renumbers BS ISO 6143:2001 as BS EN ISO 6143:2006. Licensed Copy: London S
6、outh Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6143 August 2006 ICS 71.040.40 English Version Gas analysis - Comparison methods for determining and checking the composition of
7、 calibration gas mixtures (ISO 6143:2001) Analyse des gaz - Mthodes comparatives pour la dtermination et la vrification de la composition des mlanges de gaz pour talonnage (ISO 6143:2001) Gasanalyse - Vergleichsverfahren zur Bestimmung und berprfung der Zusammensetzung von Kalibriergasgemischen (ISO
8、 6143:2001) This European Standard was approved by CEN on 21 July 2006. 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 standard without any alteration. Up-to-date lists and bibliograp
9、hical references concerning such national standards may be obtained on application to the Central Secretariat 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 CE
10、N member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia
11、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brusse
12、ls 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6143:2006: E Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Foreword The text of
13、ISO 6143:2001 has been prepared by Technical Committee ISO/TC 158 “Analysis of gases” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 6143:2006 by Technical Committee CEN/SS N21 “Gaseous fuels and combustible gas“, the secretariat of which is held by CMC
14、. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. According to the CEN/CENELEC Internal Regulat
15、ions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw
16、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 6143:2001 has been approved by CEN as EN ISO 6143:2006 without any modifications. EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank Unive
17、rsity, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 6143:2001(E) INTERNATIONAL STANDARD ISO 6143 Second edition 2001-05-01 Gas analysis Comparison methods for determining and checking the composition of calibration gas mixtures Analyse des gaz Mthodes comparati
18、ves pour la dtermination et la vrification de la composition des mlanges de gaz pour talonnage EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, Lo
19、ndon South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 1002 All rights rsedevreiii ContentsPage Foreword.iv Introduction.v 1Scope 1 2Terms and definitions .1 3Symbols and abbreviated terms 3 4Principle4 5General procedure.6 6Special procedures14 7Test report14
20、 Annex A (normative) Procedures for data evaluation.16 Annex B (informative) Examples .23 Annex C (informative) Computer implementation of recommended methods.31 Bibliography33 EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2
21、007, Uncontrolled Copy, (c) BSI iv ISO 1002 All rights rsedevre Foreword 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 co
22、mmittees. 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 collaborates closely with th
23、e 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 3. Draft International Standards adopted by the technical committees are circulated to the memb
24、er 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 International Standard may be the subject of patent rights. ISO shall not be held responsible
25、 for identifying any or all such patent rights. International Standard ISO 6143 was prepared by Technical Committee ISO/TC 158, Analysis of gases, to cancel and replace the first edition (ISO 6143:1981), of which the methods for the design and evaluation of calibrations of analytical systems have be
26、en updated and a method for estimating the uncertainty of the composition of calibration gas mixtures has been added. It also cancels and replaces ISO 6711:1981, of which entirely new methods for checking the composition of calibration gases have been specified, thus replacing the method which is no
27、 longer in use. Annex A forms a normative part of ISO 6143. Annexes B and C are for information only. EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 1002 All rights rsedevrev Introduction
28、In gas analysis, calibration of analytical systems, as specified in the first edition of ISO 6143, has largely been confined to the determination of a straight line through the origin, or of a straight-line segment, using only the minimum number of calibration standards (one for a straight line thro
29、ugh the origin, two for a line segment). The approach adopted in the revision, relating to calibration as well as to uncertainty evaluation, goes far beyond this simple scheme by ?including non-linear response curves and/or functions, ?replacing interpolation by regression, ?taking into account the
30、uncertainty on the calibration standards, ?including validation of calculated response curves and/or functions, ?calculating uncertainties by uncertainty propagation. As a consequence of adopting non-linear response models, advanced regression techniques (errors in both variables) and uncertainty pr
31、opagation, the main calculation procedures can only be performed on a computer, using a specific program. Such a program is available (see annex C). As an alternative, sufficient information is given in the document to enable the user to develop a program on his own. EN ISO 6143:2006 Licensed Copy:
32、London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 1002 All rights rsedevre1 Gas
33、 analysis Comparison methods for determining and checking the composition of calibration gas mixtures 1Scope This International Standard provides methods for ?determining the composition of a calibration gas mixture by comparison with appropriate reference gas mixtures, ?calculating the uncertainty
34、of the composition of a calibration gas mixture in relation to the known uncertainty of the composition of the reference gas mixtures with which it was compared, ?checking the composition attributed to a calibration gas mixture by comparison with appropriate reference gas mixtures, ?comparing the co
35、mposition of several calibration gas mixtures, e.g. for the purpose of comparing different methods of gas mixture preparation, or for testing consistency among gas mixtures of closely related composition. NOTEIn principle, the method described in this document is also applicable to the analysis of (
36、largely) unknown samples instead of prospective calibration gas mixtures (i.e. gas mixtures which are intended for use as calibration gas mixtures). Such applications, however, require appropriate care and consideration of additional uncertainty components, for example concerning the effect of matri
37、x differences between the reference gases used for calibration and the analysed sample. 2Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 2.1 composition characteristic of a gas mixture given by the kind and content of each specified m
38、ixture component (analyte) and the composition of the complementary gas (matrix) NOTEIn this International Standard, the analyte content is specified as a mole fraction, exclusively. Mole fractions have the advantage of being perfectly independent of the pressure and the temperature of the gas mixtu
39、re. Therefore their use is recommended. However, for specific measuring systems, other composition measures (e.g. mass concentrations) may be more appropriate. Their use then requires due care concerning the dependence on pressure and temperature. 2.2 comparison method method for determining the con
40、tent of a specified gas mixture component (analyte) by measuring an instrumental response NOTEComparison of measuring systems requires calibration, in which the relationship between response and analyte content is established. This is achieved by measuring the response to known values of analyte con
41、tent provided by reference gas mixtures. EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 ISO 1002 All rights rsedevre 2.3 calibration set of operations that establish, under specified conditi
42、ons, the relationship between values of quantities indicated by a measuring instrument or measuring system, or values represented by a material measure or reference material, and the corresponding values realized by standards VIM 2.4 response function functional relationship between instrumental res
43、ponse and analyte content NOTE 1The response function can be expressed in two different ways as a calibration function or an analysis function, depending on the choice of the dependent and the independent variable. NOTE 2The response function is conceptual and cannot be determined exactly. It is det
44、ermined approximately through calibration. 2.4.1 calibration function instrumental response expressed as a function of analyte content 2.4.2 analysis function analyte content expressed as a function of instrumental response 2.5 uncertainty of measurement parameter, associated with the result of a me
45、asurement, that characterizes the dispersion of the values that can reasonably be attributed to the measurand GUM NOTEIn keeping with the GUM, in this International Standard the uncertainty of the composition of a gas mixture is expressed as a standard uncertainty, i.e. as a single standard deviatio
46、n. 2.6 traceability property of the result of a measurement or the value attributed to a standard whereby it can be related to stated references, usually national or international standards, through an unbroken chain of comparisons all having stated uncertainties VIM 2.7 measurement standard materia
47、l measure, measuring instrument, reference material, or measuring system, intended to define, realize, conserve, or reproduce a unit or one or more values of a quantity to serve as a reference VIM 2.8 reference standard standard, generally having the highest metrological quality available at a given
48、 location or in a given organization, from which measurements made there are derived VIM EN ISO 6143:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:56:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 1002 All rights rsedevre3 2.9 working standard stand
49、ard that is used routinely to calibrate or check material measures, measuring instruments or reference materials VIM NOTEA working standard is usually calibrated against a reference standard. 2.10 reference material material or substance one or more of whose property values are sufficiently homogeneous and well established to be used for the calibration of an apparatus, the assessment of a measuring method, or for assigning values to materials ISO Guid