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1、a Date: 25 January 2008 Origin: European Latest date for receipt of comments: 30 April 2008 Project no.: 2007/00695 Responsible committee: EH/2/2 Work place atmospheres Interested committees: EH/2 Title: Draft BS EN 1076 REV Workplace exposure - Procedures for measuring gases and vapours using pumpe
2、d samplers - Requirements and test methods Supersession information: If this document is published as a standard, the UK implementation of it will supersede BSEN1076 : 1997 and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretar
3、y (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 April 2008. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgemen
4、t will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electroni
5、c circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, International and foreign standards are also available from BSI Custo
6、mer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found vi
7、a the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 8996 7186 Responsible Committee Secretary: Dr R A Wellings (BSI) E-mail: roger.wellingsbsi- Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20
8、 8996 7001 Form 36 Version 7.0 DPC: 08/30163829 DC Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:00 GMT+00:00 2008, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK has taken an active part. Y
9、our comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no comments are received to the contrary, then the UK will approve this draft and implement it as a British Standard. Comment is particularly welcome on national, legislative or similar d
10、eviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary support in Europe, the UK will be obliged to publish the official English Language text unchanged as a British Standard and to withdraw any conflicting standard. UK Vote Please indica
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14、 from the BSI web site at: http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) b
15、y the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be sup
16、ported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:0
17、0 GMT+00:00 2008, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM DRAFT prEN 1076 January 2008 ICS 13.040.30Will supersede EN 1076:1997 English Version Workplace exposure - Procedures for measuring gases and vapours using pumped samplers - Requirements and test methods E
18、xposition am Arbeitsplatz - Messung von Gasen und Dmpfen mit pumpenbetriebenen Probenahmeeinrichtungen - Anforderungen und Prfverfahren This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 137. If this draft becomes a European S
19、tandard, 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. This draft European Standard was established by CEN in three official versions (English, Frenc
20、h, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus,
21、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, Switzerland and United Kingdom. Recipients of this draft are invited to submi
22、t, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a
23、European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. prEN 10
24、76:2008: E Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:00 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 1076:2008 (E) 2 Contents Page Foreword3 Introduction.3 1 Scope 3 2 Normative references4 3 Terms and definitions .4 4 Symbols and abbreviated term
25、s 5 5 Types of samplers .6 6 Requirements.6 6.1 General6 6.2 Sampler requirements.7 6.3 Measuring procedure requirements 9 7 General test conditions.11 7.1 Reagents.11 7.2 Apparatus .11 7.3 Independent method .11 7.4 Generation of the calibration gas mixture 12 8 Test methods12 8.1 General12 8.2 Sam
26、pler test methods .13 8.3 Measuring procedure test methods.14 8.4 Measurement uncertainty.20 9 Field tests .21 10 Test report21 Annex A (informative) Examples for the determination of the breakthrough volume.23 Annex B (informative) Estimation of uncertainty of measurement25 Annex C (informative) Ex
27、ample of estimation of expanded uncertainty.36 Annex D (informative) Field test paired comparisons 40 Annex E (informative) Field test multiple comparisons .42 Bibliography44 Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:00 GMT+00:00 2008, Uncontrolled C
28、opy, (c) BSI prEN 1076:2008 (E) 3 Foreword This document (prEN 1076:2008) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held by DIN. This document is currently submitted to the CEN Enquiry. This d
29、ocument will supersede EN 1076:1997. The major technical changes between this European Standard and the previous edition are as follows: a) Adaptation of the framework for assessing the performance of procedures for measuring gases and vapours against the general requirements for the performance of
30、procedures for measuring chemical agents in workplace atmospheres as specified in EN 482; b) Revision of the calculation model for the uncertainty of measurement to comply with EN 482 and ENV 13005, respectively. Introduction This European Standard provides a framework for assessing the performance
31、of procedures for measuring gases and vapours against the general requirements for the performance of procedures for measuring chemical agents in workplace atmospheres as specified in EN 482. It enables manufacturers and users of pumped samplers and developers and users of procedures for measuring g
32、ases and vapours to adopt a consistent approach to method validation. 1 Scope This European Standard specifies performance requirements and test methods under prescribed laboratory conditions for the evaluation of pumped samplers used in conjunction with an air sampling pump and of procedures using
33、these samplers for the determination of gases and vapours in workplace atmospheres. This European Standard is applicable to pumped samplers and measuring procedures using these samplers in which sampling and analysis are carried out in separate stages. This European Standard is not applicable to: pu
34、mped samplers which are used for the direct determination of concentrations, for example, length-of- stain detector tubes; samplers which rely on sorption into a liquid, and subsequent analysis of the solution (bubblers). Additional tests designed to establish whether performance characteristics of
35、the pumped sampler are affected by the wider range of environmental influences that may be encountered in field use are described in Annex D and Annex E Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:00 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 1076
36、:2008 (E) 4 2 Normative references The following referenced documents are 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. EN 482:2006, W
37、orkplace atmospheres General requirements for the procedures for the measurement of chemical agents. EN 838, Workplace atmospheres Diffusive samplers for the determination of gases and vapours Requirements and test methods. EN 1232, Workplace atmospheres Pumps for personal sampling of chemical agent
38、s requirements and test methods EN 1540, Workplace atmospheres Terminology. EN ISO 8655-2, Piston-operated volumetric apparatus Part 2: Piston pipettes (ISO 8655-2). 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 482 and the following apply. 3.1 anal
39、ytical recovery ratio of the mass of analyte measured in a sample to the known mass of analyte in that sample 3.2 analytical variablity imprecision arising from the analytical procedure 3.3 breakthrough volume volume of air that can be passed through a sampler before the concentration of gas or vapo
40、ur eluting from the sampler reaches 5% of the concentration of the gas or vapour in the sampled air 3.4 homologous series series of compounds possessing similar physicochemical properties, each member of which differs from the preceding member by addition of a repeating unit NOTE The most common exa
41、mple of the repeating unit is the CH2- methylene group. 3.5 loading (of analyte) amount of analyte on the sampler 3.6 method recovery ratio of the concentration of analyte determined in an air sample to the known concentration of analyte in that sample 3.7 method variability imprecision arising from
42、 the measuring procedure as a whole, including sampling and analysis Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 06:36:00 GMT+00:00 2008, Uncontrolled Copy, (c) BSI prEN 1076:2008 (E) 5 3.8 pumped sampler device for taking air samples, through which the air
43、is drawn by means of a pump 3.9 retention volume (of sorbent tubes) elution volume at peak maximum of a small aliquot of a gas or vapour eluted from the tube by air (or chromatographic carrier gas) 3.10 (pumped) sorbent tube device, usually made of metal or glass, containing a sorbent or a reagent-i
44、mpregnated support, through which air is drawn by a sampling pump 4 Symbols and abbreviated terms NOTE See 8.4 and Annex B for symbols used in conjunction with uncertainty of measurement only. CRM certified reference material ma1 mass of analyte desorbed from tube blank, in micrograms ma2 mass of an
45、alyte desorbed from spiked tube, in micrograms 1 m n number of replicate samples; pat actual pressure of the test atmosphere sampled, in kilopascals Ran analytical recovery RH relative humidity of the test atmosphere, in percent tH hold-up time of the unretained substance, in minutes. ts sampling ti
46、me, in minutes Tat temperature of the test atmosphere sampled, in Kelvin; V0 volume of the test atmosphere sampled, in litres; VH gas hold-up volume (dead volume) VR uncorrected retention volume (VR) corrected retention volume v v coefficient of variation (CV)1) LV,st short-term limit value (LV) LV,
47、lt long-term limit value (LV) a volume concentration of the analyte, in millilitres per cubic metre2) a volume fraction of the analyte, in microlitres per litre 5 Types of samplers Samplers for gases and vapours can be divided into type A samplers and type B samplers: Type A samplers rely on sorptio
48、n onto a solid or onto a support impregnated with a reagent, desorption with solvent, and subsequent analysis of the desorbate. They are usually made of glass, are thermally sealed, and consist of two beds of sorbent in series, i, e, with a back-up section, and contain an active sorbent (e. g. activ
49、ated carbon) or a support impregnated with reagent. Type B samplers rely on sorption onto a solid or onto a support impregnated with a reagent, thermal desorption, and analysis of the desorbate. They are usually made of glass or metal, are sealed with removable fittings and consist of a single bed of active sorbent (e.g. porous polymer resin). 6 Requirements NOTE If there is no procedure for measuring a particular chemical agent which