1、BS EN 1076:2009ICS 13.040.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWorkplace exposure Procedures formeasuring gasesand vapours usingpumped samplers Requirements and testmethodsThis British Standardwas published under theauthority of the StandardsPolicy
2、and StrategyCommittee on 31 March2010. BSI 2010ISBN 978 0 580 58633 0Amendments/corrigenda issued since publicationDate CommentsBS EN 1076:2009National forewordThis British Standard is the UK implementation of EN 1076:2009. Itsupersedes BS EN 1076:1997 which is withdrawn.The UK participation in its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 be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correc
4、t application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 1076:2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1076 December 2009 ICS 13.040.30 Supersedes EN 1076:1997English Version Workplace exposure - Procedures for measuring gases and vapours us
5、ing pumped samplers - Requirements and test methods Exposition sur les lieux de travail - Procdures pour le mesurage des gaz et vapeurs laide de dispositifs de prlvement par pompage - Exigences et mthodes dessaiExposition am Arbeitsplatz - Messung von Gasen und Dmpfen mit pumpenbetriebenen Probenahm
6、eeinrichtungen - Anforderungen und Prfverfahren This European Standard was approved by CEN on 1 November 2009. 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 alte
7、ration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tra
8、nslation 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, Czech Republic, Denmark, Estonia, Finland, France, Germ
9、any, Greece, Hungary, Iceland, Ireland, Italy, Latvia, 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
10、 Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1076:2009: EBS EN 1076:2009EN 1076:2009 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Term
11、s and definitions .54 Symbols and abbreviated terms 55 Types of samplers .76 Requirements .76.1 General 76.2 Sampler requirements .76.3 Measuring procedure requirements . 107 General test conditions 127.1 Reagents 127.2 Apparatus 127.3 Independent method 137.4 Generation of the calibration gas mixtu
12、re . 138 Test methods . 148.1 General . 148.2 Sampler test methods 148.3 Measuring procedure test methods 158.4 Uncertainty of measurement . 229 Test report . 23Annex A (informative) Examples for the determination of the breakthrough volume 24A.1 Direct method 24A.2 Chromatographic method 24Annex B
13、(informative) Estimation of uncertainty of measurement . 26B.1 General . 26B.2 Uncertainty associated with sampled air volume . 26B.3 Uncertainty associated with sampling efficiency 28B.4 Uncertainty associated with sample storage and transportation 28B.5 Uncertainty associated with method recovery
14、28B.6 Uncertainty associated with method variability 32B.7 Calculation of combined standard uncertainty . 35Annex C (informative) Example of estimation of expanded uncertainty 37Bibliography . 41BS EN 1076:2009EN 1076:2009 (E) 3 Foreword This document (EN 1076:2009) has been prepared by Technical Co
15、mmittee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, 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 June 2010, and con
16、flicting national standards shall be withdrawn at the latest by June 2010. Attention is drawn to 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 docume
17、nt supersedes 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 procedure
18、s 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; c) modification of the classification scheme for sampler types; d) deletion of the informative annexes on the
19、evaluation of pumped samplers by means of field tests. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fran
20、ce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1076:2009EN 1076:2009 (E) 4 Introduction This European Standard provides a framewo
21、rk for assessing the performance 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 us
22、ers of procedures for measuring gases and vapours to adopt a consistent approach to method validation. BS EN 1076:2009EN 1076:2009 (E) 5 1 Scope This European Standard specifies performance requirements and test methods under prescribed laboratory conditions for the evaluation of pumped samplers use
23、d in conjunction with an air sampling pump and of procedures using 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
24、in separate stages. This European Standard is not applicable to: pumped 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). 2 Normative
25、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, Workplace atmospheres Gen
26、eral requirements for the performance of 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 1232:1997, Workplace atmospheres Pumps for personal sampling of chemical agents Requ
27、irements and test methods EN 1540:1998, Workplace atmospheres Terminology EN ISO 8655-2, Piston-operated volumetric apparatus Part 2: Piston pipettes (ISO 8655-2:2002) EN ISO 8655-6, Piston-operated volumetric apparatus Part 6: Gravimetric methods for the determination of measurement error (ISO 8655
28、-6:2002) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 482:2006 and EN 1540:19981)apply. 4 Symbols and abbreviated terms For the purposes of this document, the following symbols and abbreviations apply. NOTE See 8.4 and Annex B for symbols used in c
29、onjunction with uncertainty of measurement only. CRM certified reference material 1) EN 1540:1998 is currently subject to revision. Until the revised EN is published the definitions given in EN 482:2006 take precedence. BS EN 1076:2009EN 1076:2009 (E) 6 LV limit value ma1 mass of analyte desorbed fr
30、om tube blank, in micrograms (g) ma2 mass of analyte desorbed from spiked tube, in micrograms (g) ma,lt maximum mass uptake of analyte in a leak test performed on a sealed sampler used for making measurements for comparison with a long-term limit value, in milligrams (mg) ma,st maximum mass uptake o
31、f analyte in a leak test performed on a sealed sampler used for making measurements for comparison with a short-term limit value, in milligrams (mg) 1m LV,lt is the long-term limit value of the substance given as volume concentration, in milligrams per cubic metre (mg/m); 240 is the reference period
32、, in minutes (min); 0,01 is the nominal minimum flow rate for type B samplers, in litres per minute (l/min); 10-3 is a factor applied to convert the nominal minimum flow rate from litres per minute (l/min) to cubic metres per minute (m/min); 1/3 is a factor applied to calculate the maximum permitted
33、 leakage. When tested in accordance with 8.2.2, for substances with a short-term limit value the maximum leakage, i.e. the maximum mass uptake of analyte above the blank value (see 6.3.2.3), shall be less than ma,stcalculated according to Equation (2), in milligrams (mg), as follows: )100,01155,0(31
34、3-sta,stLV,= m (2) where ma,st is the maximum mass uptake of analyte in a leak test performed on a sealed sampler used for making measurements for comparison with a short-term limit value; LV,st is the short-term limit value of the substance given as volume concentration, in milligrams per cubic met
35、re (mg/m); 15 is the reference period, in minutes (min); 0,01 is the nominal minimum flow rate for type B samplers, in litres per minute (l/min); BS EN 1076:2009EN 1076:2009 (E) 9 10-3is a factor applied to convert the nominal minimum flow rate from litres per minute (l/min) to cubic metres per minu
36、te (m/min); 1/3 is a factor applied to calculate the maximum permitted leakage. 6.2.3 Shelf life (for impregnated supports) The manufacturer shall specify the shelf life of the sampler when stored in its original package. During this period the sampler shall fulfil all requirements. 6.2.4 Sample ide
37、ntification (for commercially available sorbent tubes and impregnated filters) The sampler shall have a suitable area for sample identification by the user. 6.2.5 Marking Samplers shall be marked with at least the following: manufacturers name; product identification; indication of the direction of
38、air flow, if necessary; batch identification; shelf life (if applicable); number of this European Standard. If required due to limited space, the marking may be placed on the packaging of the sampler. However, the manufacturers name, product identification and direction of air flow shall be indicate
39、d on the sampler. 6.2.6 Instructions for use The instructions for use supplied with the sampler shall be in the language(s) of the country where the sampler is to placed on the market. They shall contain at least the following information: a) designated use (general purpose for a number of gases and
40、 vapours or, specific, for a particular gas or vapour, see 6.1); b) blank value (only when used for a particular gas or vapour, see 6.1); c) directions for proper handling of the sampler, including opening and closing; d) general information on the principle of use, for example, sorbent type, reacti
41、on of the reagent impregnated solid, desorption method; e) information on storage and transport; f) information on health or environmental hazards and method of disposal. BS EN 1076:2009EN 1076:2009 (E) 10 6.3 Measuring procedure requirements 6.3.1 Sampling procedure requirements 6.3.1.1 General Sam
42、pling conditions (sample volume, flow rate and sampling time) shall be established according to the LV assigned to the compounds of interest, e.g. short-term limit value, long-term limit value or both. 6.3.1.2 Sample volume The recommended sample volume shall be less than two-third of the breakthrou
43、gh volume measured in accordance with 8.3.1.3. 6.3.1.3 Air flow rate 6.3.1.3.1 Impregnated filters When tested according 8.3.1.4, the maximum air flow rate shall be 90 % of the flow rate at which the breakthrough volume drops by 5 %. 6.3.1.3.2 Thermal desorption samplers (Type B samplers) A minimum
44、air flow rate shall be established according to the test in 8.3.1.5. 6.3.1.4 Storage conditions after sampling The storage conditions after sampling shall be specified. When tested in accordance with 8.3.1.6, the mean value of the recovery after storage shall not differ by more than 10 % from the va
45、lue before storage. 6.3.2 Analytical procedure requirements 6.3.2.1 Analytical quantification limit The quantification limit shall be lower than or equal to the calculated mass of analyte that would be collected for the minimum air sample volume specified in the measuring procedure at the following
46、concentrations: 0,1 LV for substances with long-term limit value; 0,5 LV for substances with short-term limit value only. 6.3.2.2 Analytical recovery When tested in accordance with 8.3.2.2, the analytical recovery Ranshall be: for Type A samplers: Ran 75 % with v 10 % at each loading; for Type B sam
47、plers: Ran 95 % with v 10 % at each loading. 6.3.2.3 Blank value When tested in accordance with 8.3.2.3 the blank value shall be less than one-tenth of the calculated mass collected by the sampler during the recommended sampling time at the recommended air flow rate and at concentrations of: BS EN 1
48、076:2009EN 1076:2009 (E) 11 0,1 LV for substances with long-term limit value; 0,5 LV for substances with short-term limit value only. Where it is known that the blank value is significant and varies between batches of samplers, it shall be checked regularly. NOTE 1 In order to eliminate any contamin
49、ation which could occur during storage before use, Type B samplers should be cleaned by taking them through the thermal desorption procedure. This cleaning process should be carried out as close as possible to the time when the samplers will be used. NOTE 2 In order to obtain acceptable values for the quantification limit of the method, the blank value of the sampling media should
