BS 6068-2 40-1991 Water quality - Physical chemical and biochemical methods - Method for the determination of borate by spectrometry using azomethine-H《水质 第2部分 物理、化学和生物化学法 第40节 甲亚胺.pdf
《BS 6068-2 40-1991 Water quality - Physical chemical and biochemical methods - Method for the determination of borate by spectrometry using azomethine-H《水质 第2部分 物理、化学和生物化学法 第40节 甲亚胺.pdf》由会员分享,可在线阅读,更多相关《BS 6068-2 40-1991 Water quality - Physical chemical and biochemical methods - Method for the determination of borate by spectrometry using azomethine-H《水质 第2部分 物理、化学和生物化学法 第40节 甲亚胺.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 6068-2.40: 1991 ISO 9390:1990 Water quality Part 2: Physical, chemical and biochemical methods Section 2.40 Method for the determination of borate by spectrometry using azomethine-HBS6068-2.40:1991 This British Standard, having been prepared under the directionof the Environment
2、andPollution Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 June1991 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference EPC/44 Draft for comment 88/52170 DC ISBN 0 580 19665 8 Committees
3、responsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards Policy Committee (EPC/-) to Technical Committee EPC/44, upon which the following bodies were represented: Association of Consulting Scientists British Association f
4、or Chemical Specialists British Gas plc Chemical Industries Association Department of the Environment for Northern Ireland Department of the Environment (Water Directorate) Department of Trade and Industry (Laboratory of the Government Chemist) Electricity Supply Industry in England and Wales Indust
5、ry Water Society Institute of Petroleum Institution of Gas Engineers Institution of Water and Environmental Management National Rivers Authority Royal Institute of Public Health and Hygiene Royal Society of Chemistry Scottish Association of Directors of Water and Sewerage Services Soap and Detergent
6、 Industry Association Water Companies Association Water Research Centre Water Services Association of England and Wales Amendments issued since publication Amd. No. Date CommentsBS6068-2.40:1991 BSI 07-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 No
7、rmative reference 1 3 Principle 1 4 Reagents 1 5 Apparatus 2 6 Sampling and samples 2 7 Procedure 2 8 Expression of results 3 9 Test report 3 Table 1 Precision data 4 Publication(s) referred to Inside back coverBS6068-2.40:1991 ii BSI 07-1999 National foreword This Section of BS6068, which has been
8、prepared under the direction of the Environment and Pollution Standards Policy Committee, is identical with ISO9390:1990 “Water quality Determination of borate Spectrometric method using azomethine-H”, published by the International Organization for Standardization (ISO). The international standard
9、was prepared by subcommittee2, Physical, chemical and biochemical methods, of ISO Technical Committee147, Water quality, with the active participation and approval of the UK. NOTEThe tests described in this Section of BS6068 should only be carried out in laboratories with suitable facilities and by
10、suitably qualified persons with an appropriate level of chemical expertise. Standard chemical procedures should be followed throughout. BS6068 is being published in a series of Parts subdivided into Sections that will generally correspond to particular international standards. Sections are being, or
11、 will be, published in Parts1 to7, which together with Part0, are listed below. Part 0: Introduction; Part 1: Glossary; Part 2: Physical, chemical and biochemical methods; Part 3: Radiological methods; Part 4: Microbiological methods; Part 5: Biological methods; Part 6: Sampling; Part 7: Precision a
12、nd accuracy. Textual errors. When adopting the text of the international standard, the following textual errors were discovered. They have been marked in the text and have been reported to ISO in a proposal to amend the text of the international standard. In4.1, line4, “L + ascorbic acid” should be
13、read as “L (+) ascorbic acid”. In4.2, at the end of line3, insert “(produced by carefully mixing together20ml of sulfuric acid ( =1.84g/ml) and80ml of distilled water)” after “( =1.21g/ml)”. In line6, (C 10 H 14 N 2 Na 2 O 8 H 2 O) should be read as “(C 10 H 14 N 2 Na 2 O 8 H 2 O)”. In the title of7
14、.4.3, “facteur” should be read as “factor”. In Table 1, the numerical values for “ r ” and “ R ” should be transposed, and in column10 delete “mgl” and insert “mg/l”. Additional information. It is recommended that the pH value of the resulting solution from4.2 is checked before the solution is used.
15、 In7.2, line4, “per10mm” means per10mm of cell path length. In8.1, definition of A 0 , it is the absorbance of the blank using the same optical cell path length as for the sample. In Table 1, the standard deviations are based on the mean values. Cross-reference International standard Corresponding B
16、ritish Standard ISO 5667-3:1985 BS6068 Water quality Section 6.3:1986 Guidance on the preservation and handling of samples (Identical)BS6068-2.40:1991 BSI 07-1999 iii The international standard has an introduction which is as follows. “The natural borate content of ground water and surface water is
17、small. The borate content of surface water can be significantly increased due to waste water discharges, because borate compounds are ingredients of domestic washing agents.” A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are res
18、ponsible 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 to iv, pages1to4, an inside back cover and a back cover. This standard has been
19、 updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankISO9390:1990(E) BSI 07-1999 1 1 Scope 1.1 Application range This International Standard specifies a spectrometric method for the determination of bo
20、rate in water. The method is applicable to the determination of borate in concentrations between0,01mg and1mg of boron per litre. The working range may be extended by dilution. This method is applicable to potable water, and to ground, surface and saline waters that are not heavily polluted. 1.2 Int
21、erferences Interferences are unlikely when analysing drinking water. Mg, Zn, Ca, Na, K, phosphate, sulfate, and nitrate are known not to interfere. Mn, Zr, Cr, Ti, Cu, V, Al, Be, and Fe may cause high results. Interference by the presence of colouration, humic acid, and/or undissolved substances may
22、 be removed by suitable procedures (e.g.destruction of the colour, filtration through a column filled with activated carbon). 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of p
23、ublication, the edition indicated was 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 edition of the standard indicated below. Members of IEC and ISO maintain regist
24、ers of currently valid International Standards. ISO5667-3:1985, Water quality Sampling Part3: Guidance on the preservation and handling of samples. 3 Principle Reaction of azomethine-H, which is the condensation product of H-acid (8-amino-naphth-1-ol-3,6-disulfonic acid) and salicylaldehyde, with di
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