BS 1747-12-1993 ISO 10313-1993.pdf
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1、BRITISH STANDARD BS 1747-12: 1993 ISO 10313: 1993 Methods for Measurement of air pollution Part 12: Determination of the mass concentration of ozone in ambient air: chemiluminescence method UDC 614.71:535.379.08:546.214 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:31:01 GMT+00:00 2006,
2、Uncontrolled Copy, (c) BSI BS 1747-12:1993 This British Standard, having been prepared under the direction of the Environment and Pollution Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 BSI 08-1999 The following BSI refe
3、rences relate to the work on this standard: Committee reference EPC/35 Draft for comment 91/51946 DC ISBN 0 580 22577 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards Policy Committee (EPC/-) to Techn
4、ical Committee EPC/35, upon which the following bodies were represented: Association of Consulting Scientists BCIRA British Cement Corporation British Coal Corporation British Gas plc Combustion Engineering Association Department of Health Department of the Environment (Her Majestys Inspectorate of
5、Pollution) Department of Trade and Industry (Laboratory of the Government Chemist) Department of Trade and Industry (Warren Spring Laboratory) Engineering Equipment and Materials Users Association GAMBICA (BEAMA Ltd.) Health and Safety Executive Institute of Petroleum Institution of Environmental He
6、alth Officers Institution of Gas Engineers National Society for Clean Air Royal Society of Chemistry The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Asbestosis Research Council British Steel plc Fibre Cement Manufacturers Association Ltd.
7、 Institute of Energy Lead Development Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:31:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-12:1993 BSI 08-1999i Contents Page Committees responsibleInside front cover Na
8、tional forewordii 1Scope1 2Definition1 3Principle1 4Reagents and materials1 5Apparatus2 6Procedure4 7Expression of results5 8Test report6 Annex A (informative) Typical performance characteristics and specifications for the chemiluminescence ozone analyser7 Annex B (informative) Bibliography7 Figure
9、1 Schematic diagram of a chemiluminescence ozone analyser2 Figure 2 Schematic diagram of a typical ultraviolet photometric calibration system3 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:31:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-12:1993 ii BSI 08-1999 National foreword T
10、his Part of BS 1747, which has been prepared under the direction of the Environment and Pollution Standards Policy Committee, is identical with ISO 10313:1993 Ambient air Determination of the mass concentration of ozone Chemiluminescence method, published by the International Organization for Standa
11、rdization (ISO) with the active participation and approval of the UK. This Part of BS 1747 is one of a series relating to air quality arising from UK participation in the work of ISO/TC 146. Methods for the determination of particular constituents of ambient air will be published as further Parts of
12、 this British Standard. Topics relating to air quality characteristics will be published as Parts of BS 6069 Characterization of air quality. Textual errors. When adopting the text of the International Standard, the textual errors given below were discovered. They have been marked in the text and ha
13、ve been reported to ISO in a proposal to amend the text of the international standard. In 4.4, note 4, line 1, “on” should be “of”. In 7.1, in the list of symbols following the equation, “p” should be “P”. A British Standard does not purport to include all the necessary provisions of a contract. Use
14、rs of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover. This stan
15、dard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:31:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-12:1993 BSI 08-19991 1 Scop
16、e 1.1 General This International Standard specifies a chemiluminescence method for the determination of the mass concentration of ozone in ambient air. The method is applicable to the determination of the mass concentration of ozone between 2 4g/m30,001 ppm(V/V) and 10 mg/m35 ppm(V/V) at the referen
17、ce conditions of 25 C and 101,3 kPa. Ultraviolet (UV) photometry is specified as the primary calibration method because of its proven accuracy and specificity to ozone. The use of transfer standards is allowed if they have been previously calibrated against the primary calibration method. 1.2 Limita
18、tions The chemiluminescent reaction of ozone with ethylene is not subject to interference from any of the common air pollutants. However, particulate matter, if not removed, will accumulate in the sampling line and may cause a measurable destruction of ozone. If particulate matter is allowed to ente
19、r the reaction chamber of the analyser, it will not only scatter the emitted light but will also accumulate on the optical window, thereby causing further attenuation of the emitted light. Also, any nitrogen(II) oxide in the sampled air will to some extent react with the ambient ozone; therefore, th
20、e time during which the ambient air remains in the sampling line must be sufficiently short to keep this effect to a minimum. NOTE 1It has been reported by some researchers that, at about 80 % relative humidity and 22 C, the responses for some commercially available chemiluminescence analysers were
21、about 10 % higher than that for dry air. However, comparisons of ambient ozone measurements using commercially available chemiluminescence and UV-photometric analysers showed no significant differences. This suggests that, in practice, any errors associated with calibrations using dry air are compen
22、sated by other effects. 2 Definition For the purposes of this International Standard, the following definition applies. 2.1 transfer standard an apparatus (transportable) with associated operational procedures that is capable of accurately measuring or reproducing ozone concentration standards which
23、 are quantitatively related to the authoritative primary standard 3 Principle The air sample is drawn continuously, at a constant flow rate, through a particle filter before it enters the chemiluminescence analyser. It then flows into a reaction chamber where it is mixed with an excess flow of ethyl
24、ene. Ozone and ethylene react instantaneously to produce light in the visible region with a maximum at a wavelength of about 400 nm. The emitted light intensity is proportional to the concentration of ozone in the air sample and is measured by a photomultiplier tube. The resulting voltage is amplifi
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