1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 21438-3:2010Workplace atmospheres Determination of inorganicacids by ion chromatographyPart 3: Hydrofluoric acid and particulatefluoridesBS ISO 21438-3:2010 BRITISH STANDA
2、RDNational forewordThis British Standard is the UK implementation of ISO 21438-3:2010.The UK participation in its 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 publi
3、cation does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 58963 8ICS 13.040.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the aut
4、hority of theStandards Policy and Strategy Committee on 31 December 2010.Amendments issued since publicationDate Text affectedBS ISO 21438-3:2010Reference numberISO 21438-3:2010(E)ISO 2010INTERNATIONAL STANDARD ISO21438-3First edition2010-08-01Workplace atmospheres Determination of inorganic acids b
5、y ion chromatography Part 3: Hydrofluoric acid and particulate fluorides Air des lieux de travail Dtermination des acides inorganiques par chromatographie ionique Partie 3: Acide fluorhydrique et fluorures particulaires BS ISO 21438-3:2010ISO 21438-3:2010(E) PDF disclaimer This PDF file may contain
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8、ers were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All right
9、s reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the
10、requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 21438-3:2010ISO 21438-3:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword
11、 iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Principle7 5 Requirement.8 6 Reagents.8 7 Apparatus.10 8 Occupational exposure assessment .13 9 Sampling.15 10 Analysis18 11 Expression of results22 12 Method performance .22 13 Test report23 Annex A (informative) Tempe
12、rature and pressure correction25 Annex B (normative) Filter materials 27 Bibliography28 BS ISO 21438-3:2010ISO 21438-3:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).
13、The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-g
14、overnmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2
15、. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a
16、vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21438-3 was prepared by Technical Committee ISO/TC 146, Air quality, Subcommittee SC 2, Wor
17、kplace atmospheres. ISO 21438 consists of the following parts, under the general title Workplace atmospheres Determination of inorganic acids by ion chromatography: Part 1: Non volatile acids (sulfuric acid and phosphoric acid) Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hyd
18、robromic acid and nitric acid) Part 3: Hydrofluoric acid and particulate fluorides BS ISO 21438-3:2010ISO 21438-3:2010(E) ISO 2010 All rights reserved vIntroduction The health of workers in many industries is at risk through exposure by inhalation of hydrofluoric acid and particulate fluorides. Indu
19、strial hygienists and other public health professionals need to determine the effectiveness of measures taken to control workers exposure, and this is generally achieved by making workplace air measurements. This part of ISO 21438 has been published in order to make available a method for making val
20、id exposure measurements for hydrofluoric acid and particulate fluorides in use in industry. It is intended for agencies concerned with health and safety at work; industrial hygienists and other public health professionals; analytical laboratories; industrial users of hydrofluoric acid and particula
21、te fluorides, and their workers. It has been assumed in the drafting of ISO 21438 (all parts) that the execution of its provisions and the interpretation of the results obtained are entrusted to appropriately qualified and experienced people. BS ISO 21438-3:2010BS ISO 21438-3:2010INTERNATIONAL STAND
22、ARD ISO 21438-3:2010(E) ISO 2010 All rights reserved 1Workplace atmospheres Determination of inorganic acids by ion chromatography Part 3: Hydrofluoric acid and particulate fluorides 1 Scope This part of ISO 21438 specifies a method for the determination of the time-weighted average mass concentrati
23、on of soluble particulate fluorides and hydrofluoric acid (HF) in workplace air by collection of the particulate fluorides on a pre-filter and HF on an alkali-impregnated filter and analysis by ion chromatography. The method is only applicable to determination of particulate fluorides that are solub
24、le using the sample preparation procedure specified. For aerosol sampling, the method is applicable to the personal sampling of the inhalable fraction of airborne particles, as defined in ISO 7708, and to static (area) sampling. The method is applicable to the determination of masses of 0,005 mg to
25、at least 1,25 mg of particulate fluorides per sample and 0,012 5 mg to at least 1,2 mg of HF per sample. The concentration range of particulate fluorides and HF in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 120 l air sample, t
26、he working range is approximately 0,04 mg m3to at least 10 mg m3for particulate fluorides and approximately 0,13 mg m3to at least 10 mg m3 for HF. HF can react with co-sampled particulate matter on the pre-filter, causing an interference on the measured concentration. 2 Normative references The foll
27、owing 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. ISO 1042, Laboratory glassware One-mark volumetric flasks
28、 ISO 3585, Borosilicate glass 3.3 Properties ISO 7708:1995, Air quality Particle size fraction definitions for health-related sampling ISO 8655-1, Piston-operated volumetric apparatus Part 1: Terminology, general requirements and user recommendations ISO 8655-2, Piston-operated volumetric apparatus
29、Part 2: Piston pipettes ISO 8655-6, Piston-operated volumetric apparatus Part 6: Gravimetric methods for the determination of measurement error EN 13205, Workplace atmospheres Assessment of performance of instruments for measurement of airborne particles BS ISO 21438-3:2010ISO 21438-3:2010(E) 2 ISO
30、2010 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 General definitions 3.1.1 breathing zone general definition space around the workers face from where he or she takes his or her breath NOTE Adapted from EN 1540:13, 2.4.5
31、. 3.1.2 breathing zone technical definition hemisphere (generally accepted to be 0,3 m in radius) extending in front of the human face, centred on the midpoint of a line joining the ears; the base of the hemisphere is a plane through this line, the top of the head and the larynx NOTE 1 The definitio
32、n is not applicable when respiratory protective equipment is used. NOTE 2 Adapted from EN 1540:13, 2.4.5. 3.1.3 chemical agent any chemical element or compound, on its own or admixed as it occurs in the natural state or as produced, used or released including release as waste, by any work activity,
33、whether or not produced intentionally and whether or not placed on the market Council Directive 98/24/EC17Art. 2(a) 3.1.4 exposure by inhalation situation in which a chemical agent is present in the air that is inhaled by a person NOTE Adapted from EN 1540:13, 2.4.1. 3.1.5 occupational exposure limi
34、t value limit of the time-weighted average of the concentration of a chemical agent in the air within the breathing zone of a worker in relation to a specified reference period Council Directive 98/24/EC17, Art. 2(d) EXAMPLES Threshold Limit Values(TLVs) established by the ACGIH (Reference 18) and i
35、ndicative occupational exposure limit values (IOELVs) promulgated by the European Commission (Council Directive 2006/15/EC19). 3.1.6 measurement procedure for the sampling and analysis of chemical agents in air measuring procedure for the sampling and analysis of chemical agents in air set of operat
36、ions, described specifically, used for the sampling and analysis of chemical agents in air NOTE A measuring procedure for the sampling and analysis of chemical agents in air usually includes the following steps: preparation for sampling, sampling, transportation and storage, preparation of samples f
37、or analysis and analysis. 3.1.7 operating time period during which a sampling pump can be operated at specified flow rate and back pressure without recharging or replacing the battery NOTE Adapted from EN 1232:199712, 3.5. BS ISO 21438-3:2010ISO 21438-3:2010(E) ISO 2010 All rights reserved 33.1.8 re
38、ference period specified period of time for which the limit value of a chemical agent applies NOTE 1 The reference period is usually 8 h for long-term measurements and 15 min for short-term measurements. NOTE 2 Adapted from EN 1540:13, 2.4.7. 3.1.9 workplace defined area or areas in which the work a
39、ctivities are carried out EN 1540:13, 2.5.2 3.2 Particle size fraction definitions 3.2.1 inhalable convention target specification for sampling instruments when the inhalable fraction is the fraction of interest ISO 7708:1995, 2.4 3.2.2 inhalable fraction mass fraction of total airborne particles wh
40、ich is inhaled through the nose and mouth NOTE The inhalable fraction depends on the speed and direction of air movement, on breathing rate and other factors. ISO 7708:1995, 2.3 3.2.3 respirable convention target specification for sampling instruments when the respirable fraction is of interest ISO
41、7708:1995, 2.12 3.2.4 respirable fraction mass fraction of inhaled particles which penetrate to the unciliated airways ISO 7708:1995, 2.11 3.2.5 total airborne particles all particles surrounded by air in a given volume of air NOTE Because all measuring instruments are size-selective to some extent,
42、 it is often impossible to measure the total airborne particle concentration. ISO 7708:1995, 2.13 3.3 Sampling definitions 3.3.1 air sampler device for separating chemical agents from the surrounding air NOTE 1 Air samplers are generally designed for a particular purpose, e.g. for sampling gases and
43、 vapours or for sampling airborne particles. NOTE 2 Adapted from EN 1540:13, 3.2.1. BS ISO 21438-3:2010ISO 21438-3:2010(E) 4 ISO 2010 All rights reserved3.3.2 personal sampler sampler, attached to a person, that collects gases, vapours or airborne particles in the breathing zone to determine exposur
44、e to chemical agents EN 1540:13, 3.2.2 3.3.3 personal sampling process of sampling carried out using a personal sampler EN 1540:13, 3.3.3 3.3.4 static sampler area sampler sampler, not attached to a person, that collects gases, vapours or airborne particles at a particular location EN 1540:13, 3.2.3
45、 3.3.5 static sampling area sampling process of air sampling carried out in a particular location EN 1540:13, 3.3.4 3.4 Analytical definitions 3.4.1 analysis all operations carried out after sample preparation to determine the amount or concentration of the analyte(s) of interest present in the samp
46、le NOTE Adapted from EN 14902:200516, 3.1.1. 3.4.2 blank solution solution prepared by taking a reagent blank, laboratory blank or field blank through the same procedure used for sample dissolution 3.4.3 calibration blank solution calibration solution prepared without the addition of any working sta
47、ndard solution NOTE 1 The concentration of fluoride in the calibration blank solution is taken to be zero. NOTE 2 Adapted from EN 14902:200516, 3.1.3. 3.4.4 calibration solution solution prepared by dilution of the working standard solution, containing an analyte at concentrations that are suitable
48、for use in calibration of the analytical instrument NOTE 1 Adapted from EN 14902:200516, 3.1.4. NOTE 2 For the purposes of this part of ISO 21438, the analyte is fluoride. BS ISO 21438-3:2010ISO 21438-3:2010(E) ISO 2010 All rights reserved 53.4.5 field blank filter that is taken through the same han
49、dling procedure as a sample, except that it is not used for sampling, i.e. it is loaded into a sampler, transported to the sampling site and then returned to the laboratory for analysis 3.4.6 laboratory blank unused filter, taken from the same batch used for sampling, that does not leave the laboratory 3.4.7 linear dynamic range range of concentrations over which the calibration curve for fluoride is linear NOTE The linear dynamic r
