BS 6075-0-1981 Methods of sampling and test for sodium hydroxide for industrial use - General introduction《工业用氢氧化钠取样和试验方法 第0部分 总则》.pdf

1、BRITISH STANDARD BS 6075-0: 1981 Methods of Sampling and test for sodium hydroxide for industrial use Part 0: General introduction UDC 661.322.1:546.33 36:543.062:543.05BS6075-0:1981 This British Standard, having been prepared under the directionof the Chemicals Standards Committee, was published un

2、der the authorityofthe Executive Boardand comes into effect on 27February1981 BSI 11-1999 The following BSI reference relates to the work on this standard: Committee reference CIC/22 ISBN 0 580 12050 3 Cooperating organizations The Chemicals Standards Committee, under whose direction this British St

3、andard was prepared, consists of representatives from the following: Association of Fatty Acid Distillers British Tar Industry Association Chemical Industries Association* Chemical Society (Analytical Division) Consumer Standards Advisory Committee of BSI Department of Health and Social Security Dep

4、artment of Industry (Laboratory of the Government Chemist) Fertiliser Manufacturers Association Ltd. Hydrocarbon Solvents Association Ministry of Agriculture, Fisheries and Food Ministry of Defence* National Sulphuric Acid Association Paintmakers Association of Great Britain Ltd. Royal Institute of

5、Public Health and Hygiene Soap and Detergent Industry Association* Standardization of Tar Products Tests Committee The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this Bri

6、tish Standard: Asbestos Cement Manufacturers Association Limited British Man-made Fibres Federation British Textile Employers Association Fabric Care Research Association Society of Glass Technology Amendments issued since publication Amd. No. Date of issue CommentsBS6075-0:1981 BSI 11-1999 i Conten

7、ts Page Cooperating organizations Inside front cover Foreword ii Table 1 Methods of sampling and test for sodium hydroxide: relationship between BS and international series 1 Publications referred to Inside back coverBS6075-0:1981 ii BSI 11-1999 Foreword This British Standard has been prepared under

8、 the direction of the Chemicals Standards Committee and provides, in separate Parts, a comprehensive series of test methods for sodium hydroxide for industrial use, both in solid form and in aqueous solution. Although applicable to the material in general, it includes all the test methods required t

9、o assess compliance with the requirements of BS4130. The latter specification is in the process of being revised and, in accordance with current BSI policy, will no longer include test methods which in the1967 edition were given in appendices. In preparing this standard, the opportunity has been tak

10、en to implement, without alteration, the majority of the International Standards describing test methods for sodium hydroxide. These have been prepared, with the active participation of the UK, by Subcommittee5, of Technical Committee47, Chemistry, of the International Organization for Standardizati

11、on (ISO). Although all such Parts are applicable to the material in general, most of them also relate to the requirements of BS4130 and replace the corresponding methods appended to the previous edition of that standard. There are, however, requirements in the specification for the contents of coppe

12、r, of manganese and of matter insoluble in water, for which there are no corresponding International Standards. The relevant test method from BS4130:1967 for the determination of copper content has therefore been included, technically unchanged, as Part12 of this standard. It was intended similarly

13、to publish the determination of manganese content as Part13 but it was subsequently decided to consider replacement of that method, because of its slowness and its failure to determine manganese in its higher oxidation states, by a well established method based on atomic absorption spectrophotometry

14、. The method for the determination of matter insoluble in water described in BS4130:1967 was technically similar to that described in ISO Recommendation R987:1969. This International Standard was withdrawn because of inaccuracies caused by mass losses arising from the partial dissolution of the sint

15、ered glass crucible by the sodium hydroxide solution. Recent work in the UK has shown that such losses are negligible provided that crucibles are suitably pre-treated with sodium hydroxide solution, prior to using them for this determination. The method, modified in this respect, is therefore publis

16、hed as Part14 of this standard. It is intended to submit the three methods concerned for consideration as International Standards. In this Part of BS6075, Table 1 gives the relationship of the other Parts of the standard to the corresponding International Standards. Additional information Ethanol. T

17、he ethanol used in these determinations may be replaced for these purposes by industrial methylated spirits, 95% (V/V) complying with the requirements of BS3591. It should be noted that the use of industrial methylated spirits is governed by The Methylated Spirits Regulations, 1952 (S.I.1952, No2230

18、) as amended by The Alcoholic Liquors (Amendment of Units and Methods of Measurement) Regulations1979 (S.I.1979, No1149). It is not permissible to use duty-free ethanol, received under the provisions of the Alcoholic Liquor Duties Act1979, Section10, for purposes for which industrial methylated spir

19、its is an acceptable alternative to ethanol. NOTEAdditional guidance on sampling is given in BS3020-1, BS3020-3 and BS3020-4.BS6075-0:1981 BSI 11-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their c

20、orrect 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, pagesi toiv, pages1 and2, an inside back cover and a back cover. This standard has been updated (see copyri

21、ght date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS6075-0:1981 BSI 11-1999 1 Table 1 Methods of sampling and test for sodium hydroxide: relationship between BS and international series BS 6075 Part no. Corresponding I

22、nternational Standard no. Subject Type of Determination Relationship of International Standard to BS test method 0 General introduction 1 979 Sodium hydroxide content Titrimetric Identical 980 Carbonate content Gas-volumetric Not implemented; one test method, ISO 3196, considered to be sufficient 2

23、981 Chloride content Mercurimetric Identical 982 Sulphate content Gravimetric Not implemented method disapproved by UK 3 983 Iron content Photometric Identical (1,10-phenanthroline) 4 984 Silica content Photometric Identical 985 Silica content Gravimetric Not implemented method disapproved by UK 986

24、 Calcium content Complexometric Not implemented method disapproved by UK 5 3195 Sampling and preparation of main test solution Identical 6 3196 Carbonate content Titrimetric Identical 7 3197 Chloride content Photometric Identical 8 3198 Sulphate content Reduction and titrimetric Identical 9 3697 Cal

25、cium and magnesium contents Flame AAS Identical 10 5992 Mercury content Photometric Identical 11 5993 Mercury content Flameless AAS Identical 12 Copper content Photometric No equivalent International Standard 13 a Manganese content No equivalent International Standard 14 Matter insoluble in water Gr

26、avimetric No equivalent International Standard a In course of preparation.2 blankBS6075-0:1981 BSI 11-1999 Publications referred to BS 3591, Industrial methylated spirits. BS 4130, Sodium hydroxide (technical grades). BS 6075-0: 1981 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstit

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