BS-1747-7-1983 ISO-4221-1980.pdf
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1、BRITISH STANDARD BS 1747-7: 1983 ISO 4221:1980 Methods for Measurement of air pollution Part 7: Determination of mass concentration of sulphur dioxide in ambient air: Thorin spectrophotometric method ISO title: Air quality Determination of mass concentration of sulphur dioxide in ambient air: Thorin
2、 spectrophotometric method UDC 551.510.42:614.72:551.508.95:546.224-31 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:29:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-7:1983 This British Standard, having been prepared under the direction of the Environment and Pollution Standards
3、Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1983 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference EPC/35 Draft for comment 77/51792 DC ISBN 0 580 13120 3 Cooperating organizations The Environmen
4、t and Pollution Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: Association of County Councils British Gas Corporation* British Industrial Measuring and Control Apparatus Manufacturers Association (BEAMA)* British Paper a
5、nd Board Industry Federation (PIF) British Railways Board British Steel Corporation* Chemical Industries Association Confederation of British Industry Consumer Standards Advisory Committee of BSI Council of Engineering Institutions Council of Environmental Conservation Department of Industry (Labora
6、tory of the Government Chemist)* Department of Industry (Warren Spring Laboratory)* Department of the Environment (Water Directorate) Department of Transport Electricity Supply Industry in England and Wales* Engineering Equipment Users Association Greater London Council Health and Safety Executive*
7、Institute of Petroleum* Medical Research Council Ministry of Agriculture, Fisheries and Food National Coal Board* National Water Council Royal Society of Chemistry Scottish Office Trades Union Congress The organizations marked with an asterisk in the above list, together with the following, were dir
8、ectly represented on the Technical Committee entrusted with the preparation of this British Standard: Cement Makers Federation Department of Health and Social Security Institution of Environmental Health Officers Institution of Gas Engineers Lead Development Association National Industrial Fuel Effi
9、ciency Service National Society for Clean Air Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:29:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-7:1983 BSI 10-1999i Contents Page Cooperating organizationsInside front c
10、over National forewordii 1Scope1 2Field of application1 3Reference1 4Principle1 5Reagents1 6Apparatus2 7Sampling3 8Procedure3 9Expression of results4 10Test report5 Figure 1 Absorption bottle2 Figure 2 Typical calibration curve obtained using a single-beam spectrophotometer with cells having an opti
11、cal path length of 20 mm5 Figure 3 Typical calibration curve obtained using a single-beam spectrophotometer with cells having an optical path length of 10 mm6 Figure 4 Typical calibration curve obtained using a double-beam spectrophotometer with cells having an optical path length of 20 mm7 Figure 5
12、 Typical calibration curve obtained using a double-beam spectrophotometer with cells having an optical path length of 10 mm8 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:29:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-7:1983 ii BSI 10-1
13、999 National foreword This Part of this British Standard, which has been prepared under the direction of the Environment and Pollution Standards Committee, is identical with ISO 4221:1980 “Air quality Determination of mass concentration of sulphur dioxide in ambient air Thorin spectrophotometric met
14、hod”. The International Standard was prepared by Technical Committee 146, Air quality, and published by the International Organization for Standardization (ISO) as a result of discussion in which the UK participated. This Part of this British Standard is one of a series relating to air quality arisi
15、ng from the 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 this standard. Topics relating to air quality characteristics will be published as Parts of BS 6069 “Methods for characterization of a
16、ir quality”. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to th
17、e following. The comma has been used throughout as a decimal marker. It is current practice in British Standards to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. A Bri
18、tish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-reference International StandardCorrespo
19、nding British Standard ISO 4219:1979BS 1747 Methods for measurement of air pollution Part 6:1982 Sampling equipment used for the determination of gaseous sulphur compounds in ambient air (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages
20、1 to 8, an inside back cover and a back cover. This standard 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 03:29:55 GMT+00:00 2006, Uncont
21、rolled Copy, (c) BSI BS 1747-7:1983 BSI 10-19991 1 Scope This International Standard specifies a Thorin1) spectrophotometic method for the determination of the mass concentration of sulphur dioxide in ambient air. 2 Field of application This method is applicable to the determination of the mass conc
22、entration of sulphur dioxide in ambient air within the range of 3,5 to 150 4g/m3, assuming an air sample volume of 2 m3 and a sample solution volume of 50 ml. For higher concentrations, dilution of the sample may be necessary before carrying out the determination.2) Interference from ammonia and hyd
23、rogen sulphide may occur if these are present in very high concentrations. Interferences from particulate matter are avoided at the sampling stage by filtering the air. (See also 8.3.) NOTEDiluting may be sometimes unnecessary if the air sample collected over a specified period is reduced by dividin
24、g the overall sampling period into intervals of the same duration and sampling in such a way that intervals of absorption are followed by intervals where the sampling pump is switched off. 3 Reference ISO 4219, Air quality Determination of gaseous sulphur compounds in ambient air Sampling equipment.
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