1、BRITISH STANDARDBS EN 14662-3:2005Ambient Air Quality Standard method for the measurement of benzeneconcentrations Part 3: Automated pumped sampling with in situ gas chromatographyThe European Standard EN 14662-3:2005 has the status of a British StandardICS 13.040.20g49g50g3g38g50g51g60g44g49g42g3g5
2、8g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIBS EN 14662-3:2005This British Standard was publ
3、ished under the authority of the Standards Policy and Strategy Committee on 27 June 2005 BSI 27 June 2005ISBN 0 580 46132 7National forewordThis British Standard is the official English language version of EN 14662-3:2005.The UK participation in its preparation was entrusted by Technical Committee E
4、H/2, Air quality, to Subcommittee EH/2/3, Ambient Atmospheres, which has the responsibility to:A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to
5、 in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of
6、a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or propos
7、als for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 44, an inside back cover and a back cover.The BSI copy
8、right notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14662-3May 2005ICS 13.04
9、0.20English versionAmbient Air Quality - Standard method for the measurement ofbenzene concentrations - Part 3: Automated pumped samplingwith in situ gas chromatographyQualit de lair ambiant - Mthode pour le mesurage desconcentrations en benzne - Partie 3 - Echantillonnage parpompage automatique sui
10、vi dune chromatographie enphase gazeuse in situLuftbeschaffenheit - Standardverfahren zur Bestimmungvon Benzolkonzentrationen - Teil 3: AutomatischeProbenahme mit einer Pumpe mit gaschromatographischerIn-situ-BestimmungThis European Standard was approved by CEN on 21 March 2005.CEN members are bound
11、 to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Centr
12、al 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the
13、 officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Swe
14、den, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref
15、. No. EN 14662-3:2005: ELicensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662-3:2005 (E) 2ContentsForeword 31 Scope.42 Normative references .43 Terms and definitions.44 Symbols and abbreviated terms85 Principles.96 Reagents and materials107 Apparatus 118 Type
16、approval129 Field Operation and Ongoing Quality Control 2510 Reports and documentation 33Annex A (normative) Test of lack of fit35Annex B (informative) Calculation of uncertainty in field operation at the limit value for individual measurements .37Annex C (informative) An example of the results of a
17、n inter-calibration exercise39Annex D (informative) Components and applications of type approved benzene monitors .42Bibliography.44Licensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662-3:2005 (E) 3Foreword This European Standard (EN 14662-3:2005) has been pre
18、pared 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 endorsement, at the latest by November 2005, and conflicting national standards sh
19、all be withdrawn at the latest by November 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 EU Directive 2000/69/EC and EU Directive 96/62 EC. According to the CEN/CENELEC Int
20、ernal Regulations, 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, Neth
21、erlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662-3:2005 (E) 41 Scope This part of EN 14662 is in accordance with the generic methodology selected as the
22、basis of the European Union Reference Method for the determination of benzene in ambient air 1 for the purpose of comparison of measurement results with limit values with a one-year reference period. The standard describes guidelines for measurements with, and type approval of, automated gas chromat
23、ographs. The use of automated instruments gives this part a different structure compared to the other parts including the procedure for selecting an appropriate automated gas chromatograph by means of type approval tests. Requirements for use in the field are also described. The standard is applicab
24、le to measurements of airborne benzene vapour in the concentration range from 0 g/m3to 50 g/m3(Standardised to 101,3 kPa and 293 K). This concentration range represents the certification range for benzene in the type approval test. 2 Normative references The following referenced documents are indisp
25、ensable 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. ENV 13005, Guide to the expression of uncertainty in measurement EN ISO 14956, Air quality - E
26、valuation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956:2002) EN ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:1999) ISO 5725-2:1994, Accuracy (trueness and precision) of m
27、easurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 5725-3:1995, Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measu
28、rement method ISO 6142: 2001 Gas analysis Preparation of calibration gas mixtures - Gravimetric method ISO 6143 Gas analysis Determination of the composition of calibration gas mixtures Comparison methods ISO 6144 Gas analysis - Preparation of calibration gas mixtures - Static volumetric methodISO 6
29、145 (all parts) Gas analysis - Preparation of calibration gas mixtures - Dynamic volumetric methods3 Terms and definitions For the purposes of this European Standard the following terms and definitions apply. 3.1 Ambient air outdoor air in the troposphere Licensed Copy: Wang Bin, na, Sun Oct 09 07:2
30、8:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662-3:2005 (E) 53.2 Ambient temperature temperature at the sample inlet outside the monitoring station 3.3 Availability of the analyser fraction of the total time period for which valid measuring data of the ambient air concentration is available 3.4 Cal
31、ibration comparison of the analyser response to a known gas concentration with a known uncertainty 3.5 Carry-over (memory effect) influence of the previous measurement due to the retention of benzene within the instrument 3.6 Certification range concentration range for which the analyser is type app
32、roved 3.7 Combined standard uncertainty calculation result of combining the standard uncertainties calculated from all performance characteristics specified in this standard according to the prescribed procedure given in this standard 3.8 Designated body body (which can be a laboratory) which has be
33、en designated for a specific task (type approval tests and/or QA/QC activities in the field) by a competent authority in the Member States NOTE It is recommended that the designated body is accredited for the specific task according to EN ISO/IEC 17025 3.9 Detection limit lowest concentration level
34、in ambient air for which the instrument does not give a zero response 3.10 Expanded uncertainty for the purposes of this standard, the combined uncertainty of the measurement multiplied by a factor of 2 and so expressed with a level of confidence of 95 % 3.11 Independent measurement individual measu
35、rement that is not influenced by a previous individual measurement 3.12 Individual measurement measurement averaged over a time period equal to the sampling time 3.13 Influence quantity quantity that affects the result of a measurement 3.14 Interference response of the analyser to interferentsLicens
36、ed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662-3:2005 (E) 63.15 Interferent single gaseous component in the sampled air, other than benzene, that affects the output signal of the analyser 3.16 International (measurement) standard standard recognised by an int
37、ernational agreement to serve internationally as the basis for assigning values to other standards of the quantity concerned 3.17 Lack of fit deviation of the average of a series of measurements at the same concentration from the linear regression line 3.18 Limit value concentration level fixed on t
38、he basis of scientific knowledge, with the aim of avoiding, preventing or reducing harmful effects on human health, as stated in the EU legislation 3.19 Linearity ability of a series of data to be modelled by a linear regression line 3.20 Long term drift change in zero or span readings over the peri
39、od of unattended operation 3.21 Measurand particular quantity subject to measurement. For the purpose of this EN-standard it is benzene in air 3.22 Monitoring station enclosure located in the field in which an automated benzene-analyser has been installed in such a way that its performance and opera
40、tion complies with the prescribed requirements 3.23 Operational range concentration range for which the analyzer is calibrated. It shall not exceed the certification range 3.24 Parallel measurement two measurements from different analysers, sampling from one and the same sampling manifold starting a
41、t the same time and ending at the same time 3.25 Performance characteristic one of the parameters assigned to equipment in order to define its performance, e.g. linearity 3.26 Performance criterion limiting quantitative numerical value assigned to a performance characteristic, to which conformance i
42、s tested 3.27 Repeatability (of results of measurement) closeness of the agreement between the results of successive measurements of the same measurand carried out under the same conditions of measurement 2 Licensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontrolled Copy, (c) BSIEN 14662
43、-3:2005 (E) 7NOTE 1 These conditions are called laboratory repeatability conditions and include: - the same measurement procedure; - the same analyser, used under the same conditions; - at the same location; - repetition over a short period of time; - the same observer. NOTE 2 In this EN-standard th
44、e repeatability is expressed as a value with a level of confidence of 95 %. 3.28 Response time time interval between the instant when a stimulus is subjected to a specified abrupt change and the instant when the response reaches and remains within specified limits around its final steady value. NOTE
45、 For the analyzers described in this Standard, that perform measurements integrated over a certain time period, the response time is at least one measurement cycle. 3.29 Reproducibility under field conditions closeness of the agreement between the results of parallel measurements with two analysers
46、in ambient air carried out under the same conditions of measurement NOTE 1 These conditions are called field reproducibility conditions and include: - the same measurement procedure; - two identical analysers, used under the same conditions; - at the same monitoring station; - the period of unattend
47、ed operation. NOTE 2 In this EN-standard the reproducibility under field conditions is expressed as a value with a level of confidence of 95 % 3.30 Sampled air ambient air that has been sampled through the sampling inlet and sampling system 3.31 Sampling inlet entrance to the sampling system where t
48、he ambient air is collected from the atmosphere 3.32 Short term drift change in zero or span measurement results over a 24 hour period 3.33 Sorbent materials that can collect benzene from sample air with near 100 % efficiency and release it again by heating in a flow of a carrier gas e.g. nitrogen,
49、helium or hydrogen 3.34 Standard uncertainty uncertainty of the result of a measurement expressed as a standard deviation ENV 13005:1999 3.35 Temperature of surrounding air temperature of the air directly surrounding the analyser, ie the temperature inside the monitoring station or laboratory 3.36 Transfer standard working standard that is routinely used to calibrate or check measuring instruments and is traceable to an international standard and can be moved (transferred) from place to place Licensed Copy: Wang Bin, na, Sun Oct 09 07:28:27 BST 2005, Uncontr
