1、BSI Standards PublicationBS EN 482:2012+A1:2015BS EN 482:2012Workplace exposure General requirements for theperformance of procedures forthe measurement of chemicalagentsBS EN 482:2012+A1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 482:2012+A1:2015. It
2、supersedes BS EN 482:2012 which is withdrawn.BSI, as a member of CEN, is obliged to publish EN 482:2012+A1:2015 as a British Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK committee voted against its approval as a European Standard.The
3、 reason for this is due to the inclusion of new subclause 5.4.6 Chemical agents with low limit values. This new subclause allows the use of methods with greater variability for low exposure limits, undermining the existing performance criteria.The start and finish of text introduced or altered by am
4、endment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by .The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subcommittee EH/2/2,
5、Work place atmospheres.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 20
6、15. Published by BSI Standards Limited 2015ISBN 978 0 580 85704 1ICS 13.040.30Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2012.Amendments/corrigenda
7、 issued since publicationDate Text affected30 November 2015 Implementation of CEN amendment A1:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 482:2012+A1 October 2015 ICS 13.040.30 Supersedes EN 482:2012English Version Workplace exposure - General requirements for the performance of proced
8、ures for the measurement of chemical agents Exposition sur les lieux de travail - Exigences gnrales concernant les performances des procdures de mesure des agents chimiques Exposition am Arbeitsplatz - Allgemeine Anforderungen an die Leistungsfhigkeit von Verfahren zur Messung chemischer Arbeitsstof
9、fe This European Standard was approved by CEN on 9 March 2012 and includes Amendment 1 approved by CEN on 15 August 2015. 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 witho
10、ut 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 any other l
11、anguage 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 Republic, Den
12、mark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE
13、 FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 482:2012+A1:2015 EContents Pag
14、e European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Classification . 7 4.1 General 7 4.2 Screening measurements of time weighted average concentration 7 4.3 Screening measurements of variation of concentration in time and/or space 7 4.4 Measurement
15、s for comparison with (occupational exposure) limit values and periodic measurements 7 5 Performance requirements . 7 5.1 General 7 5.2 Screening measurements of time weighted average concentration 8 5.3 Screening measurements of variation of concentration in time and/or space 8 5.4 Measurements for
16、 comparison with limit values and periodic measurements . 8 5.4.1 Unambiguity 8 5.4.2 Selectivity . 8 5.4.3 Averaging time . 8 5.4.4 Measuring range 9 5.4.5 Expanded uncertainty . 9 5.4.6 Chemical agents with low limit values 9 5.5 Composite procedures 9 5.6 Transport and storage . 9 5.7 Environment
17、al conditions 10 5.8 Description of measuring procedure 10 5.9 Dimension of result . 10 5.10 Additional requirements . 10 6 Test method . 10 7 Validation report 11 Annex A (informative) Structure of a method description . 12 Annex B (informative) Calculation of uncertainty of measurement. 13 B.1 Gen
18、eral . 13 B.2 Uncertainty associated with sampled air volume or mass uptake 14 B.2.1 Pumped sampling. 14 B.2.1.1 Sources of uncertainty 14 B.2.1.2 Flow rate measurement . 14 B.2.1.3 Pump flow stability 15 BS EN 482:2012+A1:2015 EN 482:2012+A1:2015 (E)B.2.1.4 Sampling time 16 B.2.2 Diffusive sampling
19、 16 B.2.2.1 Sources of uncertainty 16 B.2.2.2 Uptake rate 16 B.2.2.3 Sampling time 16 B.3 Uncertainty associated with sampling efficiency 16 B.3.1 Pumped sampling methods for gases and vapours 16 B.3.2 Diffusive sampling methods for gases and vapours . 17 B.3.3 Aerosol sampling methods 17 B.3.3.1 Ge
20、neral . 17 B.3.3.2 Closeness of matching with the required sampling convention(s) 17 B.3.3.3 Uncertainty components for aerosol samplers Estimates for general use . 17 B.3.3.4 Efficiency of the collection substrate . 18 B.3.3.4.1 Filter materials 18 B.3.3.4.2 Foams 18 B.4 Uncertainty associated with
21、 sample storage and transportation . 18 B.4.1 Sample storage 18 B.4.2 Transportation 18 B.4.2.1 Gas samples and vapour samples . 18 B.4.2.2 Aerosol samples 18 B.5 Uncertainty associated with method recovery for gases and vapours . 18 B.6 Uncertainty associated with analytical recovery for airborne p
22、articles and mixtures of airborne particles and vapour 19 B.7 Uncertainty associated with method variability for gases and vapours 19 B.8 Uncertainty associated with analytical variability for airborne particles and mixtures of airborne particles and vapour . 19 B.9 General equation for combination
23、of uncertainty components 20 Bibliography . 21 BS EN 482:2012+A1:2015 EN 482:2012+A1:2015 (E)European foreword This document (EN 482:2012+A1:2015) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is hel
24、d 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 April 2016, and conflicting national standards shall be withdrawn at the latest by April 2016. Attention is drawn to the possibility that
25、some of the elements 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. This document includes Amendment 1 approved by CEN on 2015-08-15. This document supersedes !EN 482:2012“. The start and finish of
26、 text introduced or altered by amendment is indicated in the text by tags !“. !deleted text“ 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,
27、Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kin
28、gdom. BS EN 482:2012+A1:2015 EN 482:2012+A1:2015 (E)Introduction National laws and regulations based on European Directives require the assessment of the potential exposure of a worker to chemical agents in workplace atmospheres. One way of assessing such exposure is to measure the concentration of
29、a chemical agent in the air in the workers breathing zone. The procedures used for such measurements should give reliable and valid results, so that when compared with set occupational exposure limit values, a correct decision can be made, for instance, as to whether the exposure level is acceptable
30、 or control measures need to be applied. !Because of their importance in the process of exposure assessment, it is required that the measuring procedures fulfil some general requirements which are given in this document. Specific European Standards have been prepared for different types of measuring
31、 procedures and measuring devices. These include European Standards for airborne particle samplers (EN 13205-1), diffusive samplers (EN 838), pumped samplers (EN 1076), detector tubes (EN ISO 17621), sampling pumps (EN ISO 13137), metals and metalloids (EN 13890), mixtures of airborne particles and
32、vapour (EN 13936) and direct reading instruments (EN 45544 (all parts). In these specific European Standards, additional requirements have been included for the procedure or device in question, so that the general requirements of this document are not compromised. Where no specific European Standard
33、 exists, only the general requirements apply.“ Performance requirements are given in this document for unambiguity, selectivity, averaging time, measuring range and expanded uncertainty for minimum specified measuring ranges. These requirements are intended to apply under environmental conditions pr
34、esent at the workplace. However, because a wide range of environmental conditions are encountered in practice, this document specifies requirements that have to be fulfilled by measuring procedures when tested under prescribed laboratory conditions. It is the users responsibility to choose the appro
35、priate procedures or devices that meet the requirements of this document. One way of doing this is to obtain information or confirmation from the provider of a procedure or the manufacturer of a device. Type-testing or, more generally, assessment of the performance of procedures or devices, can be u
36、ndertaken by the manufacturer, user, test house or research and development laboratory, as is most appropriate. A number of existing procedures for workplace measurements have either been tested over a part of the required minimum measuring range, but not over the entire range, or have not been test
37、ed for all environmental influences and potential interferences. If these partially validated procedures meet the performance requirements of this European Standard, they can be used at present. Nevertheless these procedures should be tested over the full ranges as soon as is reasonably practicable.
38、 If there is no measuring procedure for a chemical agent which meets the requirements of this document, a procedure should be used whose performance is closest to the specified requirements. BS EN 482:2012+A1:2015 EN 482:2012+A1:2015 (E)1 Scope !This European Standard specifies general requirements
39、for the performance of procedures for the determination of the concentration of chemical agents in workplace atmospheres as required by the Chemical Agents Directive 98/24/EC (see reference 9). The requirements given apply to all measuring procedures, irrespective of the physical form of the chemica
40、l agent (gas, vapour, airborne particles), the sampling method and the analytical method used.“ This European Standard is applicable to all steps of a measuring procedure, measuring procedures with separate sampling and analysis steps, and direct-reading devices. 2 Normative references The following
41、 documents, in whole or in part, are normatively referenced in this 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 481, Workplace a
42、tmospheres - Size fraction definitions for measurement of airborne particles EN 838, Workplace exposure - Procedures for measuring gases and vapours using diffusive samplers - Requirements and test methods EN 1076, Workplace exposure - Procedures for measuring gases and vapours using pumped samplers
43、 - Requirements and test methods EN 1540, Workplace exposure - Terminology EN 13205-1, Workplace exposure - Assessment of sampler performance for measurement of airborne particle concentrations - Part 1: General requirements EN 13890, Workplace exposure - Procedures for measuring metals and metalloi
44、ds in airborne particles - Requirements and test methods EN 13936, Workplace exposure - Procedures for measuring a chemical agent present as a mixture of airborne particles and vapour - Requirements and test methods EN 45544 (all parts), Workplace atmospheres Electrical apparatus used for the direct
45、 detection and direct concentration measurement of toxic gases and vapours EN ISO 13137, Workplace atmospheres Pumps for personal sampling of chemical and biological agents Requirements and test methods (ISO 13137) EN ISO 17621, Workplace atmospheres Short term detector tube measurement systems Requ
46、irements and test methods (ISO 17621) ISO 78-2, Chemistry Layouts for standards Part 2: Methods of chemical analysis“ BS EN 482:2012+A1:2015 EN 482:2012+A1:2015 (E)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1540 apply. 4 Classification 4.1 Genera
47、l In this document, measurements are classified according to their purpose. These classifications are based upon the measurement strategy laid down in EN 689. 4.2 Screening measurements of time weighted average concentration Screening measurements of time weighted average concentration are performed
48、 to obtain relatively crude quantitative information on exposure levels. Such information is used to identify potential health hazards, and to estimate the risk to health based on the likely severity of harm and the probability of its occurrence. These measurements can also determine if the exposure
49、 is significantly below or significantly above the (occupational exposure) limit value. 4.3 Screening measurements of variation of concentration in time and/or space Screening measurements of variation of concentration in time and/or space are used to: a) provide information on the likely pattern of the concentration of chemical agents in the air, b) identify locations and periods of elevated exposure, c) provide information on the location and intensity of emission sources, and d) estimate the effectiveness of ventilation or other technical mea
