BS-1747-10-1990 ISO-6767-1990.pdf
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1、BRITISH STANDARD BS 1747-10: 1990 ISO 6767:1990 Methods for Measurement of air pollution Part 10: Determination of the mass concentration of sulphur dioxide in ambient air: tetrachloromercurate (TCM)/pararosaniline method Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:30:37 GMT+00:00 2006
2、, Uncontrolled Copy, (c) BSI BS 1747-10:1990 This British Standard, having been prepared under the direction of the Environment and Pollution Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1991 BSI 09-1999 The following BSI refer
3、ences relate to the work on this standard: Committee reference EPC/35 Draft for comment 84/50182 DC ISBN 0 580 19284 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards Policy Committee (EPC/-) to Techni
4、cal Committee EPC/35, upon which the following bodies were represented: British Coal British Gas British Steel Corporation Cement Makers Federation Department of Health Department of Trade and Industry (Laboratory of the Government Chemist) Department of Trade and Industry (Warren Spring Laboratory)
5、 Electricity Supply Industry in England and Wales GAMBICA (BEAMA Ltd.) Health and Safety Executive Institute of Petroleum Institution of Environmental Health Officers Institution of Gas Engineers Lead Development Association National Industrial Fuel Efficiency Service National Society for Clean Air
6、Society of Chemical Industry The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Asbestosis Research Council Chartered Institution of Building Services Engineers Council of Environmental Conservation Department of the Environment Department o
7、f the Environment (Building Research Establishment) Engineering Equipment and Materials Users Association Fibre Cement Manufacturers Association Limited Institute of Energy Institute of Occupational Hygienists Institute of Occupational Medicine Institution of Electrical Engineers London Regional Tra
8、nsport Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:30:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-10:1990 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative refere
9、nces1 3Principle1 4Reagents1 5Apparatus2 6Sampling3 7Procedure3 8Expression of results4 9Test report5 Annex A (normative) Test for the purity and method of purification of pararosaniline hydrochloride (PRA)7 Annex B (normative) Determination of the mass concentration of sulfur dioxide present in the
10、 sodium disulfite solution for routine checks7 Annex C (informative) Recovery of mercury from fresh and used solutions8 Figure 1 Examples of absorption bottles suitable for sampling sulfur dioxide in air5 Figure 2 Examples of sampling trains for the determination of the mass concentration of sulfur
11、dioxide in ambient air6 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 03:30:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1747-10:1990 ii BSI 09-1999 National foreword This Part of BS 1747, which has been prepared under the direction of the Env
12、ironment and Pollution Standards Policy Committee, is identical with ISO 6767:1990 “Ambient air Determination of the mass concentration of sulfur dioxide Tetrachloromercurate (TCM)/pararosaniline method” published by the International Organization for Standardization (ISO) with the active participat
13、ion 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 this British Standard. Topics relating to
14、 air quality characteristics will be published as Parts of BS 6069 “Characterization of air quality”. Typographical error. In clause 3, paragraph 4, line 1, delete the second “the”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards
15、are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardsCorresponding British Standards ISO 4219:1979BS 1747 Methods for measurement of air pollution Part 6:1983 Sampling equi
16、pment used for the determination of gaseous sulphur compounds in ambient air (Identical) ISO 6349:1979BS 4559 Methods for preparation of calibration gas mixtures Part 7:1981 Permeation method (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, p
17、ages 1 to 10, 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 03:30:37 GMT+00:00 2006,
18、Uncontrolled Copy, (c) BSI BS 1747-10:1990 BSI 09-19991 1 Scope This International Standard specifies a spectrophotometric method, known as the tetrachloromercurate (TCM)/pararosaniline method, for the determination of the mass concentration of sulfur dioxide in ambient air within the range of 20 4g
19、/m3 to about 500 4g/m3. The sampling period is 30 min to 60 min. If a longer sampling period than 60 min is used, or higher concentrations of sulfur dioxide (up to about 2 000 4g/m3) are expected, care is necessary to ensure that the concentrations of sulfur dioxide in the absorption solution given
20、in clause 6, paragraph 2 are not exceeded. This can be achieved by a reduction of the volume flow rate during sampling. Sample solutions obtained by this procedure may be stored for up to 24 h before making measurements, provided that they are kept in a refrigerator at about 5 C. Substances which ar
21、e known to interfere and which might be present in the air being sampled are listed in 7.5. Indications of the precision and accuracy of the method, and of the lower detection limit are given in 8.2. Detection limit, standard deviations and interferences qualify the TCM-method for orientating field
22、measurements in the higher concentration range. When more accurate measurements are necessary, instruments which are specially tested and calibrated should be used. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this
23、International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated b
24、elow. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 4219:1979, Air quality Determination of gaseous sulphur compounds in ambient air Sampling equipment. ISO 6349:1979, Gas analysis Preparation of calibration gas mixtures Permeation method. 3 Principle Abso
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