1、BRITISH STANDARDBS ISO 4226:2007Air quality General aspects Units of measurementICS 01.060; 13.040.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g5
2、8BS ISO 4226:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 57796 3National forewordThis British Standard is the UK implementation of ISO 4226:2007. It supersedes BS 6069-1:1994 which is withdrawn.T
3、he UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subcommittee EH/2/4, General aspects.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary prov
4、isions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationDate CommentsReference numberISO 4226:2007(E)INTERNATIONAL STANDARD ISO4226Third edition2007-12-15Air quality Ge
5、neral aspects Units of measurement Qualit de lair Aspects gnraux Units de mesurage BS ISO 4226:2007ii iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
6、ally 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-governmental, in liaison with ISO, also take part in t
7、he 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. The main task of technical committees is to prepare
8、 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 vote. ISO 4226 was prepared by Technical Committee IS
9、O/TC 146, Air quality, Subcommittee SC 4, General aspects. This third edition cancels and replaces the second edition (ISO 4226:1993), Table 1 of which has been editorially revised. BS ISO 4226:2007iv Introduction The series of International Standards on air quality includes the standardization of m
10、ethods for the measurement of gases, vapours and particles. In order to enable results to be compared either within or between countries, it is essential to use agreed units of measurement to report the results and other relevant information so that sound conclusions may be drawn. It is also desirab
11、le to keep the number of units of measurement to a minimum. BS ISO 4226:20071Air quality General aspects Units of measurement 1 Scope This International Standard lays down the units to be used when reporting results of air quality measurements. NOTE General guidance on the International System of Un
12、its is given in ISO 1000. 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.
13、ISO 31-0, Quantities and units Part 0: General principles ISO 1000, SI units and recommendations for the use of their multiples and of certain other units 3 Units The units specified in Table 1 shall be used when reporting results of air quality measurements. The units of other quantities used in re
14、porting shall be in accordance with ISO 1000 and with the general principles concerning units specified in ISO 31-0. BS ISO 4226:20072 Table 1 Units Unit No. Quantity Name Symbol 3.1 Units for substances 3.1.1 Gases and vapours 3.1.1.1 volume or mass fraction of main constituents (for example nitrog
15、en, oxygen, carbon dioxide in air)percent % 3.1.1.2 volume fraction of gaseous pollutantsacubic centimetre per cubic metre cubic millimetre per cubic metre cm3/m3mm3/m33.1.1.3 molar fraction of gaseous pollutantsamillimole per mole micromole per mole nanomole per mole mmol/mol mol/mol nmol/mol 3.1.1
16、.4 mass concentration of gaseous pollutantsbmilligram per cubic metre microgram per cubic metre nanogram per cubic metre picogram per cubic metre mg/m3g/m3ng/m3pg/m33.1.1.5 diffusion coefficient of gaseous pollutants centimetre squared per second centimetre squared per minute cm2/s cm2/min 3.1.2 Par
17、ticles 3.1.2.1 mass concentration of suspended matterbmilligram per cubic metre microgram per cubic metre nanogram per cubic metre picogram per cubic metre mg/m3g/m3ng/m3pg/m33.1.2.2 size of particles micrometre nanometre m nm 3.1.2.3 atmospheric dustfallc(deposit gauges) gram per square metre day m
18、illigram per square metre day g/(m2d) mg/(m2d) 3.1.2.4 deposition rate microgram per square metre second g/(m2s) 3.1.2.5 deposition velocity centimetre per second cm/s 3.1.2.6 number concentration (for example of biological, microbiological and other suspended matter, i.e. pollen, spores, micro-orga
19、nisms, particles)breciprocal cubic metre reciprocal cubic decimetre m3dm33.2 Units for specifying the state of gas 3.2.1 thermodynamic temperature kelvin K 3.2.2 Celsius temperature degree Celsius C 3.2.3 pressure pascal kilopascal Pa kPa 3.2.4 relative humidity (ratio of vapour pressure to saturati
20、on vapour pressure with respect to water) percent % 3.3 Meteorological quantities 3.3.1 wind speed metre per second m/s 3.3.2 wind directionddegree 3.3.3 precipitation intensity millimetre per day millimetre per hour mm/d mm/h BS ISO 4226:20073Table 1 (continued) Unit No. Quantity Name Symbol 3.3.4
21、irradiance watt per square metre W/m23.3.5 atmospheric pressure hectopascal kilopascal hPa kPa 3.3.6 absolute humidity (mass of water vapour to total volume) gram per cubic metre g/m33.3.7 mixing ratio (mass of water vapour to mass of dry air) gram per kilogram g/kg 3.3.8 visibility (visual range) k
22、ilometre km 3.4 Time second minute hour day s min h d 3.5 Miscellaneous 3.5.1 geographical coordinates northern (N) or southern (S) latitude eastern (E) or western (W) longitudeedegree minute second “ 3.5.2 universal transverse Mercator (UTM) coordinatesfmetre m 3.5.3 altitude metre aAbbreviated ter
23、ms such as “ppm” (parts per million) and “ppb” parts per (US) billion equivalent to parts per thousand million shall not be used. A volume fraction of e.g. 4,3 cm3/m3is equal to 4,3 106. A volume fraction of e.g. 4,3 mm3/m3is equal to 4,3 109.A molar fraction of e.g. 3,0 nmol/mol is equal to 3,0 109
24、. bIf concentrations are expressed in terms of mass per volume, temperature and pressure as well as humidity have to be specified (e.g. ambient conditions or specific standard conditions). cWhen deposit gauges are used, no account is taken of the volume of air from which the atmospheric dustfall is
25、deposited; the duration of collection of the atmospheric dustfall should also be reported. dWind direction is conventionally reported as an angle, in degrees, measured clockwise over 360 for the full circle starting from the true north as 0. eNorthern latitude can also be indicated by “+”, southern
26、latitude by “” in front of the numbers of the degrees. Longitude can also be indicated with respect to the longitude of Greenwich by, using “+” for western longitude and “” for eastern longitude. fUTM coordinates are expressed in terms of a zone and easting and northing coordinates within this zone.
27、 The coordinates are expressed in metres. BS ISO 4226:2007BS ISO 4226:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international le
28、vel. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be gra
29、teful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400.BSI offers members an individual up
30、dating service called PLUS which ensures that subscribers automatically receive the latest editions of standards.Buying standardsOrders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: o
31、rdersbsi-. Standards are also available from the BSI website at http:/www.bsi-.In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested.Information on standardsBSI provides
32、a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44
33、(0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-.Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7
34、002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-.Information regarding online access to British Standards via British Standards Online can be found at http:/www.bsi- information about BSI is available on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI a
35、lso holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, r
36、ecording or otherwise without prior written permission from BSI.This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.
