BS ISO 17733-2015 Workplace air Determination of mercury and inorganic mercury compounds Method by cold-vapour atomic absorption spectrometry or atomic fluorescence spectrometry《工作.pdf

1、BSI Standards PublicationBS ISO 17733:2015Workplace air Determinationof mercury and inorganicmercury compounds Method by cold-vapour atomicabsorption spectrometryor atomic fluorescencespectrometryBS ISO 17733:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO

2、 17733:2015. It supersedes BS ISO 17733:2004 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee EH/2/2, Work place atmospheres.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not pur

3、port to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 88601 0 ICS 13.040.30 Compliance with a British Standard cannot confer immunity from legal oblig

4、ations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 17733:2015 ISO 2015Workplace air Determination of mercury and inorganic mercury compounds

5、 Method by cold-vapour atomic absorption spectrometry or atomic fluorescence spectrometryAir des lieux de travail Dtermination du mercure et des composs inorganiques de mercure Mthode par spectromtrie dabsorption atomique ou spectromtrie de fluorescence atomique de la vapeur froideINTERNATIONAL STAN

6、DARDISO17733Second edition2015-12-15Reference numberISO 17733:2015(E)BS ISO 17733:2015ISO 17733:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utili

7、zed otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright

8、 officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 17733:2015ISO 17733:2015(E)Foreword viIntroduction vii1 Scope . 12 Normative references 13 Terms and definitions . 23.1 General definitions 23.2 Particle si

9、ze fraction definitions 33.3 Sampling definitions 33.4 Analytical definitions . 43.5 Statistical terms 64 Principle 75 Interferences 76 Requirement . 87 Reagents 88 Apparatus 108.1 Sampling equipment for diffusive sampling . 108.2 Sampling equipment for pumped sampling . 118.3 Laboratory apparatus 1

10、48.4 Analytical instrumentation 169 Occupational exposure assessment .219.1 General 219.2 Personal sampling . 219.3 Static (area) sampling 219.4 Selection of measurement conditions and measurement pattern 229.4.1 General. 229.4.2 Screening measurements of variation of concentration in time and/or sp

11、ace 229.4.3 Screening measurements of time-weighted average concentration and worst case measurements 229.4.4 Measurements near an emission source 229.4.5 Measurements for comparison with limit values and periodic measurements .2210 Sampling .2310.1 Selection of sampling method . 2310.1.1 Measuremen

12、t of mercury vapour .2310.1.2 Measurement of particulate inorganic mercury compounds .2310.1.3 Measurement of mercury vapour and particulate inorganic mercury compounds2310.2 Consideration of temperature and pressure effects 2410.2.1 Effect of temperature and pressure on the uptake rate of diffusive

13、 badges 2410.2.2 Effect of temperature and pressure on volumetric flow rate in the pumped sampling method 2410.2.3 Expression of results .2410.3 Diffusive sampling . 2410.3.1 Selection and use of diffusive badges2410.3.2 Preparation for sampling . 2510.3.3 Sampling position 2610.3.4 Sample collectio

14、n .2610.3.5 Transportation of samples . 2610.4 Pumped sampling 2710.4.1 Preliminary considerations . 2710.4.2 Preparation for sampling . 28 ISO 2015 All rights reserved iiiContents PageBS ISO 17733:2015ISO 17733:2015(E)10.4.3 Sampling position 2910.4.4 Collection of samples 3010.4.5 Transportation o

15、f samples . 3011 Analysis .3111.1 General 3111.2 Cleaning of glassware and plasticsware . 3111.3 Preparation of blank, sample and calibration solutions for analysis of diffusive badges .3111.3.1 Preparation of blank and sample solutions .3111.3.2 Preparation of calibration solutions 3211.4 Preparati

16、on of blank, sample and calibration solutions for analysis of pumped samples .3311.4.1 Preparation of blank and sample solutions .3311.4.2 Preparation of calibration solutions 3411.5 Instrumental analysis . 3511.5.1 Setting up the instrument . 3511.5.2 Introduction of solutions into the mercury cold

17、-vapour generation system .3611.5.3 Conditioning the mercury cold-vapour generation system .3611.5.4 Check for contamination of the reagents and/or system 3711.5.5 Calibration 3711.5.6 Determination .3811.6 Estimation of detection and quantification limits .3911.6.1 Estimation of the instrumental de

18、tection limit 3911.6.2 Estimation of the method detection limit and the quantification limit .3911.7 Quality control 4011.7.1 Reagent blanks and laboratory blanks 4011.7.2 Quality control solutions 4011.7.3 Certified reference materials (CRMs) .4011.7.4 External quality assessment . 4011.8 Measureme

19、nt uncertainty 4012 Expression of results .4112.1 Calculation of the volume of air samples 4112.1.1 Diffusive sampling .4112.1.2 Pumped sampling 4112.2 Calculation of mercury in air concentrations 4113 Method performance 4213.1 General 4213.2 Detection and quantification limits 4213.2.1 Sampling wit

20、h diffusive badges and analysis by cold-vapour atomic absorption spectrometry . 4213.2.2 Sampling with pumped sorbent tubes and analysis by cold-vapour atomic absorption spectrometry . 4213.2.3 Sampling with pumped sorbent tubes and analysis by cold-vapour atomic fluorescence spectrometry 4213.2.4 S

21、ampling with inhalable samplers and analysis by cold-vapour atomic absorption spectrometry . 4213.3 Upper limits of the analytical range . 4313.4 Blank values 4313.5 Bias and precision . 4313.5.1 Analytical bias .4313.5.2 Analytical precision 4313.5.3 Overall bias of sampling and analysis methods .4

22、413.5.4 Overall precision of sampling and analysis methods 4413.6 Overall uncertainty of sampling and analysis methods 4413.7 Effects on sampler performance . 4513.7.1 Effect of exposure concentration and time on sampler performance 4513.7.2 Effect of atmospheric temperature, pressure and humidity o

23、n sampler performance .4513.7.3 Effect of air velocity on performance of diffusive badges .45iv ISO 2015 All rights reservedBS ISO 17733:2015ISO 17733:2015(E)13.8 Sample uptake rate and sampling capacity of diffusive badges 4613.9 Collection efficiency, breakthrough volume and sampling capacity of s

24、orbent tubes .4613.10 Storage stability 4613.11 Mechanical strength 4613.12 Interferences 4614 Test report 4714.1 Test record . 4714.2 Laboratory report 48Annex A (informative) Guidance on selection of a sampling method for mercury vapour .49Annex B (informative) Temperature and pressure corrections

25、 50Bibliography .52 ISO 2015 All rights reserved vBS ISO 17733:2015ISO 17733:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out throu

26、gh 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-governmental, in liaison with ISO, also take part in the work. ISO collabora

27、tes closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval cr

28、iteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject

29、of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade nam

30、e used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technica

31、l Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 146, Air quality, Subcommittee SC 2, Workplace atmospheres.This second edition cancels and replaces the first edition (ISO 17733:2004), of which it constitutes a

32、 minor revision. This edition corrects a typographical error in the title of 7.10.vi ISO 2015 All rights reservedBS ISO 17733:2015ISO 17733:2015(E)IntroductionThe health of workers in many industries is at risk through exposure by inhalation of mercury and inorganic mercury compounds. Industrial hyg

33、ienists 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 International Standard presents a method for making valid exposure measurements for mercury and i

34、norganic mercury compounds in use in industry. It will be of benefit to: agencies concerned with health and safety at work; industrial hygienists and other public health professionals; analytical laboratories; industrial users of mercury and inorganic mercury compounds and their workers, etc.The pro

35、cedure described in this International Standard is based upon a method published by the United Kingdom Health and Safety Executive1, which was developed after a thorough review of sampling and analysis techniques available for determination of mercury and inorganic mercury compounds in air2. This pr

36、ocedure has been fully validated and the resulting back-up data are freely available3, 4. Similar methods have been published by the United States Occupational Safety and Health Administration (OSHA)5, 6and the United States National Institute of Occupational Safety and Health (NIOSH)7.It has been a

37、ssumed in the drafting of this International Standard that the execution of its provisions and the interpretation of the results obtained are entrusted to appropriately qualified and experienced people. ISO 2015 All rights reserved viiBS ISO 17733:2015BS ISO 17733:2015Workplace air Determination of

38、mercury and inorganic mercury compounds Method by cold-vapour atomic absorption spectrometry or atomic fluorescence spectrometry1 ScopeThis International Standard specifies a procedure for determination of the time-weighted average mass concentration of mercury vapour and inorganic mercury compounds

39、 in workplace air. Mercury vapour is collected on a solid sorbent using either a diffusive badge or a pumped sorbent tube. Particulate inorganic mercury compounds, if present, are collected on a quartz fibre filter. Samples are analysed using either cold vapour atomic absorption spectrometry (CVAAS)

40、 or cold vapour atomic fluorescence spectrometry (CVAFS) after acid dissolution of the mercury collected.This International Standard is applicable to the assessment of personal exposure to mercury vapour and/or particulate inorganic mercury compounds in air for comparison with long-term or short-ter

41、m exposure limits for mercury and inorganic mercury compounds and for static (area) sampling.The lower limit of the working range of the procedure is the quantification limit. This is determined by the sampling and analysis methods selected by the user, but it is typically in the range 0,01 g to 0,0

42、4 g of mercury (see 13.1). The upper limit of the working range of the procedure is determined by the capacity of the diffusive badge, sorbent tube or filter used for sample collection, but it is at least 30 g of mercury (see 13.2). The concentration range of mercury in air for which this Internatio

43、nal Standard is applicable is determined in part by the sampling method selected by the user, but it is also dependent on the air sample volume.The diffusive badge method is not applicable to measurements of mercury vapour when chlorine is present in the atmosphere, e.g. in chloralkali works, but ch

44、lorine does not interfere with the pumped sorbent tube method (see 13.12.1). Gaseous organomercury compounds could cause a positive interference in the measurement of mercury vapour (see 13.12.2). Similarly, particulate organomercury compounds and gaseous organomercury compounds adsorbed onto airbor

45、ne particles could cause a positive interference in the measurement of particulate inorganic mercury compounds (see 13.12.3).2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references

46、, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 648, Laboratory glassware Single-volume pipettesISO 1042, Laboratory glassware One-mark volumetric flasksISO 3585, Borosilicate glass 3.3 PropertiesISO 3696:

47、1987, Water for analytical laboratory use Specification and test methodsISO 7708:1995, Air quality Particle size fraction definitions for health-related samplingISO 8655-1, Piston-operated volumetric apparatus Part 1: Terminology, general requirements and user recommendationsISO 8655-2, Piston-opera

48、ted volumetric apparatus Part 2: Piston pipettesINTERNATIONAL STANDARD ISO 17733:2015(E) ISO 2015 All rights reserved 1BS ISO 17733:2015ISO 17733:2015(E)ISO 8655-5, Piston-operated volumetric apparatus Part 5: DispensersISO 8655-6, Piston-operated volumetric apparatus Part 6: Gravimetric methods for

49、 the determination of measurement errorEN 13205:2002, Workplace atmospheres Assessment of performance of instruments for measurement of airborne particle concentrations3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1 General definitions3.1.1chemical agentany chemical element or compound, on its own or admixed as it occurs in the natural state or as produced by any work activity, whether or not produced intentionally and whether or not placed on the marke