1、February 2009DEUTSCHE NORM English price group 5No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.040.01!$V$“1510101w
2、ww.din.deDDIN ISO 4226Air quality General aspects Units of measurement (ISO 4226:2007)English version of DIN ISO 4226:2009-02Luftbeschaffenheit Allgemeine Gesichtspunkte Einheiten (ISO 4226:2007)Englische Fassung DIN ISO 4226:2009-02SupersedesDIN ISO 4226:1996-02www.beuth.deDocument comprises 5 page
3、sThis standard has been included in the VDI/DIN Handbook on air quality, volume 5National foreword This standard has been prepared by Technical Committee ISO/TC 146 “Air quality”, Subcommittee SC 4 “General aspects”. The responsible German body involved in its preparation was the Kommission Reinhalt
4、ung der Luft (KRdL) im VDI und DIN-Normenausschuss (Commission on Air Pollution Prevention of VDI and DIN Standards Committee), Section IV Umweltmesstechnik. Amendments This standard differs from DIN ISO 4226:1996-02 as follows: a) For the quantity “volume fraction of gaseous pollutants” (3.1.1.2),
5、the unit “part per million (10-6)” has been replaced by the units “cubic centimetre per cubic metre” and “cubic millimetre per cubic metre”. The use of “ppm” is no longer allowed. b) The quantity “molar fraction of gaseous pollutants” (3.1.1.3) has been added. c) The quantity “diffusion coefficient
6、of gaseous pollutants” (3.1.1.5) has been added. d) For the quantity “size of particles” (3.1.2.2), the unit “nanometre” has been added. e) The quantity “deposition rate” (3.1.2.4) has been added. f) The quantity “deposition velocity” (3.1.2.5) has been added. g) For the quantity “atmospheric pressu
7、re” (3.3.5), the unit “hectopascal” has been added. h) The quantity “absolute humidity” (3.3.6) has been added. i) The quantity “mixing ratio” (3.3.7) has been added. j) The quantity “visibility” (3.3.8) has been added. k) The quantity “universal transverse Mercator (UTM) coordinates” (3.5.2) has be
8、en added. Previous editions DIN ISO 4226: 1981-01, 1996-02 DIN ISO 4226:2009-02 2Air 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 o
9、f Units 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) appli
10、es. 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 i
11、n reporting shall be in accordance with ISO 1000 and with the general principles concerning units specified in ISO 31-0. Introduction The series of International Standards on air quality includes the standardization of methods for the measurement of gases, vapours and particles. In order to enable r
12、esults 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 desirable to keep the number of units of measurement to a minimum. DIN ISO 4226:2009-02
13、 3Table 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 nitrogen, oxygen, carbon dioxide in air)percent % 3.1.1.2 volume fraction of gaseous pollutantsacubic centimetre per cubic metre cubic mill
14、imetre 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 3.1.1.4 mass concentration of gaseous pollutantsbmilligram per cubic metre microgram per cubic metre nanogram per cubic metre picogram per
15、 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 Particles 3.1.2.1 mass concentration of suspended matterbmilligram per cubic metre microgram per cubic metre nanogram per cubic metre pi
16、cogram 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 milligram 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 v
17、elocity 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-organisms, particles)breciprocal cubic metre reciprocal cubic decimetre m3dm33.2 Units for specifying the state of gas 3.2.1 thermodynami
18、c 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 saturation 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 di
19、rectionddegree 3.3.3 precipitation intensity millimetre per day millimetre per hour mm/d mm/h DIN ISO 4226:2009-02 4Table 1 (continued) Unit No. Quantity Name Symbol 3.3.4 irradiance watt per square metre W/m23.3.5 atmospheric pressure hectopascal kilopascal hPa kPa 3.3.6 absolute humidity (mass of
20、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) kilometre km 3.4 Time second minute hour day s min h d 3.5 Miscellaneous 3.5.1 geographical coordinates northern (N) or southern
21、(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 terms such as “ppm” (parts per million) and “ppb” parts per (US) billion equivalent to parts per thousand million shall not be used
22、. 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. bIf concentrations are expressed in terms of mass per volume, temperature and pressure as well as humidity have to be specifie
23、d (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 deposited; the duration of collection of the atmospheric dustfall should also be reported. dWind direction is conventionally rep
24、orted 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 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. The coordinates are expressed in metres. DIN ISO 4226:2009-02 5
