BS EN 482-2012 Workplace exposure General requirements for the performance of procedures for the measurement of chemical agents《工作场所空气 测量化学试剂程序性能的一般要求》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 482:2012Workplace exposure General requirements for theperformance of procedures forthe measurement of chemicalagentsCopyright European Committee for Standardization Provid

2、ed by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 482:2012. Itsupersedes BS EN 482:2006 which is withdrawn.The UK participation in its

3、 preparation was entrusted to TechnicalCommittee EH/2/2, Work place atmospheres.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its corre

4、ctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 73130 3ICS 13.040.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy

5、Committee on 30 April 2012.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012EUROPEAN STANDARD NORME EUROPENNE EU

6、ROPISCHE NORM EN 482 April 2012 ICS 13.040.30 Supersedes EN 482:2006English Version Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents Exposition sur les lieux de travail - Exigences gnrales concernant les performances des procdures de

7、mesure des agents chimiques Exposition am Arbeitsplatz - Allgemeine Anforderungen an die Leistungsfhigkeit von Verfahren zur Messung chemischer Arbeitsstoffe This European Standard was approved by CEN on 9 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st

8、ipulate 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-CENELEC Management Centre or to any CEN member. This Europea

9、n 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-CENELEC Management Centre has the same status as the official versions. CEN members are t

10、he 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,

11、Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membe

12、rs. Ref. No. EN 482:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012EN 482:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references

13、53 Terms and definitions .64 Classification 64.1 General 64.2 Screening measurements of time weighted average concentration 64.3 Screening measurements of variation of concentration in time and/or space .64.4 Measurements for comparison with (occupational exposure) limit values and periodic measurem

14、ents 65 Performance requirements .65.1 General 65.2 Screening measurements of time weighted average concentration 75.3 Screening measurements of variation of concentration in time and/or space .75.4 Measurements for comparison with limit values and periodic measurements 75.4.1 Unambiguity .75.4.2 Se

15、lectivity .75.4.3 Averaging time .75.4.4 Measuring range 75.4.5 Expanded uncertainty .85.5 Composite procedures 85.6 Transport and storage .85.7 Environmental conditions .85.8 Description of measuring procedure .95.9 Dimension of result .95.10 Additional requirements .96 Test method 97 Validation re

16、port . 10Annex A (informative) Structure of a method description . 11Annex B (informative) Calculation of uncertainty of measurement 12B.1 General . 12B.2 Uncertainty associated with sampled air volume or mass uptake 13B.3 Uncertainty associated with sampling efficiency 15B.4 Uncertainty associated

17、with sample storage and transportation 17B.5 Uncertainty associated with method recovery for gases and vapours 17B.6 Uncertainty associated with analytical recovery for airborne particles and mixtures of airborne particles and vapour . 17B.7 Uncertainty associated with method variability for gases a

18、nd vapours. 18B.8 Uncertainty associated with analytical variability for airborne particles and mixtures of airborne particles and vapour . 18B.9 General equation for combination of uncertainty components . 18Bibliography . 20Copyright European Committee for Standardization Provided by IHS under lic

19、ense with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012EN 482:2012 (E) 3 Foreword This document (EN 482:2012) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretari

20、at 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 October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012. Attention is drawn to

21、 the possibility that 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 supersedes EN 482:2006. The major technical changes between this European Standard and the pr

22、evious edition are as follows: a) The terms and definitions given in the previous edition have been replaced by a normative reference to EN 1540:2011. b) The maximum expanded uncertainty for mixtures of airborne particles and vapour has been changed from 30 % to 50 %, for concentration measurements

23、between 0,5 times and 2 times the limit value. c) The former Annex A, regarding measurement categories described in EN 689 and involving a combination of measurement tasks, has been deleted. d) The former Annex C (now Annex B) has been revised to remove information already given in EN 838, EN 1076 a

24、nd EN 13890. 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, Estonia, Finland, France, Germany, Greece, Hungary, Ice

25、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduct

26、ion or networking permitted without license from IHS-,-,-BS EN 482:2012EN 482:2012 (E) 4 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 exposur

27、e is to measure the concentration of 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 whe

28、ther the exposure level is acceptable or control measures need to be applied. Because of their importance in the process of exposure assessment, it is required that the measurement procedures fulfil some general requirements which are given in this document. Specific European Standards have been pre

29、pared for different types of measuring procedures and measuring devices. These include European Standards for dust samplers (EN 13205), diffusive samplers (EN 838), pumped samplers (EN 1076), detector tubes (EN 1231), sampling pumps (EN 1232 and EN 12919), metals and metalloids (EN 13890), mixtures

30、of airborne particles and vapour (ENV 139361) 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 n

31、o specific European Standard 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

32、environmental conditions present 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 respons

33、ibility to choose the appropriate 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 proc

34、edures or devices, can be undertaken 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 r

35、ange, or have not been tested 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

36、 is reasonably practicable. 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. 1) A new edition of ENV 13936 is currently being elaborated and is foreseen to be

37、published as EN 13936. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012EN 482:2012 (E) 5 1 Scope This European Standard specifies general performance requirements f

38、or 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 7). These requirements apply to all measuring procedures, irrespective of the physical form of the chemical agent (gas, vapour, ai

39、rborne 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 documents, in whole or i

40、n 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 atmospheres Size fraction d

41、efinitions 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 Requirements and test methods EN

42、1231, Workplace atmospheres Short term detector tube measurement systems Requirements and test methods EN 1232:19972), Workplace atmospheres Pumps for personal sampling of chemical agents Requirements and test methods EN 1540, Workplace exposure Terminology EN 12919:1999 2), Workplace atmospheres Pu

43、mps for the sampling of chemical agents with a volume flow rate of over 5 l/min Requirements and test methods EN 13205, Workplace atmospheres Assessment of performance of instruments of airborne particle concentrations EN 13890, Workplace exposure Procedures for measuring metals and metalloids in ai

44、rborne particles Requirements and test methods EN 45544 (all parts), Workplace atmospheres Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours ISO 78-2, Chemistry Layouts for standards Part 2: Methods of chemical analysis 2) A European S

45、tandard, EN ISO 13137, is being elaborated and is foreseen to replace this document. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 482:2012EN 482:2012 (E) 6 3 Terms and d

46、efinitions For the purposes of this document, the terms and definitions given in EN 1540 apply. 4 Classification 4.1 General 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 meas

47、urements of time weighted average concentration Screening measurements of time weighted average concentration are performed 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

48、on the likely severity of harm and the probability of its occurrence. These measurements can also determine if the exposure 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) identi