BS 4258-12-1982 Methods of test for phosphoric acid (orthophosphoric acid) for industrial use - Guide to sampling techniques《工业用磷酸(正磷酸)试验方法 第12部分 取样技术指南》.pdf
《BS 4258-12-1982 Methods of test for phosphoric acid (orthophosphoric acid) for industrial use - Guide to sampling techniques《工业用磷酸(正磷酸)试验方法 第12部分 取样技术指南》.pdf》由会员分享,可在线阅读,更多相关《BS 4258-12-1982 Methods of test for phosphoric acid (orthophosphoric acid) for industrial use - Guide to sampling techniques《工业用磷酸(正磷酸)试验方法 第12部分 取样技术指南》.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 4258-12: 1982 ISO 4285:1977 Methods of test for Phosphoric acid (orthophosphoric acid) for industrial use Part 12: Guide to sampling techniques ISO title: Phosphoric acid for industrial useGuide to sampling techniques UDC 661.634.2:543.05BS4258-12:1982 This British Standard, havi
2、ng been prepared under the directionof the Chemicals Standards Committee, was published under the authorityofthe Board of BSIon 30November1982 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference CIC/25 Draft for comment75/53887 DC ISBN 0 580 13078 9 Coop
3、erating organizations The Chemicals Standards Committee, under whose direction this BritishStandard was prepared, consists of representatives from the followingGovernment departments and scientific and industrial organizations: Association of Fatty Acid Distillers British Tar Industry Association Ch
4、emical Industries Association* Chemical Society, Analytical Division Department of Health and Social Security Department of Industry, Chemicals and Textiles Division Department of Industry, Laboratory of the Government Chemist* Fertiliser Manufacturers Association Ltd.* Hydrocarbon Solvents Associat
5、ion Ministry of Agriculture, Fisheries and Food Ministry of Defence National Sulphuric Acid Association Paintmakers Association of Great Britain Ltd. Royal Institute of Public Health and Hygiene Soap and Detergent Industry Association Standardization of Tar Products Tests Committee The organizations
6、 marked with an asterisk in the above list, together with thefollowing, were directly represented on the committee entrusted with thepreparation of this British Standard: British Pharmacopoeia Commission Campden Food Preservation Research Association Flour Milling and Baking Research Association Ins
7、titute of Metal Finishing Institution of Water Engineers and Scientists National Association of Soft Drinks Manufacturers Society of Chemical Industry Textile Institute Coopted member Amendments issued since publication Amd. No. Date of issue CommentsBS4258-12:1982 BSI 08-1999 i Contents Page Cooper
8、ating organizations Inside front cover National foreword ii 1 Scope 1 2 Field of application 1 3 References 1 4 Means of delivery 1 5 Apparatus 1 6 Procedure 1 7 Sampling report 3 Annex ISO publications relating to phosphoric acid for industrial use 4 Publications referred to Inside back coverBS4258
9、-12:1982 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction of the Chemical Standards Committee in order to provide methods of test for phosphoric acid. This Part is identical with ISO4285 “Phosphoric acid for industrial useGuide to sampling techniques” publ
10、ished in1977 by the International Organization for Standardization (ISO). For some years the UK has participated in the work of preparing methods of test for phosphoric acid for industrial use, organized by subcommittee6 (formerly Working Group7) “Phosphoric acid and condensed phosphates” of Technic
11、al Committee47 “Chemistry” of ISO. As international agreement is reached on the methods, it is proposed to publish them as Parts of this British Standard. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without d
12、eviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Cross-references. The
13、Technical Committee has reviewed the provisions of ISO683-XIII:1974 and ISO3165:1976, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. However, ISO683-XIII is related to BS1449 “Steel plate, sheet and strip” Part2:1975 “Stain
14、less and heat resisting steel plate, sheet and strip” and ISO3165 is related to BS5309 “Methods for sampling chemical products” Part1:1976 “Introduction and general principles”. ISO . . . . “Chemical productsSampling techniques for mobile liquids and mobile liquids derived from solids” has not yet b
15、een published. Until it is available, guidance can be found in BS5309 “Methods of sampling chemical products” Part3 “Sampling of liquids”. The ISO publications relating to phosphoric acid for industrial use, which are listed in the Annex, correspond to Parts of this British Standard as follows. ISO
16、publication Part of BS4258 ISO848 No equivalent (seeISO3707) ISO849 Part2 Determination of iron content (Technically equivalent) ISO2997 Part3 Determination of sulphate content (Technically equivalent) ISO3359 Part6 Determination of arsenic content (Identical) ISO3360 Part4 Determination of fluorine
17、 content (Technically equivalent) ISO3361 Part5 Determination of silica content (Technically equivalent) ISO3706 Part7 Determination of total phosphorus (V) oxide content:Quinoline phosphomolybdate gravimetric method (Technically equivalent) ISO3707 Part8 Determination of calcium content (flame atom
18、ic absorption method) (Identical) ISO3708 Part9 Determination of chloride content (Technically equivalent) ISO3709 Part10 Determination of oxides of nitrogen content (Identical) ISO4285 Part12 Guide to sampling techniques (Identical)BS4258-12:1982 BSI 08-1999 iii Textual errors. When adopting the te
19、xt of the International Standard, the errors given below 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. A British Standard does not purport to include all the necessary provisions of a contract. Users of
20、 British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Clause reference Textual change Clause4 In line4, “1000ml” should be “1000l”. Clause5.1.2 In line4 of the note, insert “some” before “phosph
21、oricacids”. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to4, 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
22、 inside front cover.iv blankBS4258-12:1982 BSI 08-1999 1 1 Scope This International Standard is a guide to sampling techniques concerning the procedure to be followed and the precautions to be observed for the taking, the preparation and the storage of samples from a delivery of phosphoric acid for
23、industrial use, with a view to assessing its quality. 2 Field of application This guide to sampling techniques applies to orthophosphoric and polyphosphoric acids prepared by thermal and by wet processes, as well as to crystallized phosphoric acids. The sampling of wet-process acids is particularly
24、difficult because of the frequent presence of a more or less copious precipitate that is not easy to disperse into a suspension. 3 References ISO683-XIII, Heat-treated steels, alloy steels and free-cutting steelsPart13: Wrought stainless steels. ISO3165, Sampling of chemical products for industrial
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