1、BRITISH STANDARD BS5688-0: 1986 Methods of test for Orthoboric acid (boricacid), diboron trioxide (boric oxide), disodium tetraborates, sodium perborates and crude sodium borates for industrial use Part0: General introduction UDC 661.65:546.273:543BS5688-0:1986 This British Standard, having been pre
2、pared under the directionof the Chemical Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 31 July1986 BSI 01-2000 First published February1979 First revision July1986 The following BSI references relate to the work on this standard: Committee referenc
3、e CIC/16 Draft(ref.85/52519) announced inBSI News August1985 ISBN 0 580 15036 4 Committees responsible for this BritishStandard The publication of this BritishStandard was entrusted by the Chemicals Standards Committee(CIC/-) to Technical Committee CIC/16, upon which the following bodies were repres
4、ented: British Pharmacopoeia Commission Chemical Industries Association Soap and Detergent Industry Association Amendments issued since publication Amd. No. Date of issue CommentsBS5688-0:1986 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii Table 1 Methods of test i
5、ncluded in BS5688 1BS5688-0:1986 ii BSI 12-1999 Foreword This Part of BS5688 has been prepared under the direction of the Chemicals Standards Committee. BS5688 provides a comprehensive series of test methods for orthoboric acid, diboron trioxide, disodium tetraborates, sodium perborates and crude so
6、dium borates for industrial use. This Part of BS5688 is a revision of BS5688-0:1979, which is withdrawn. In this revision the list of methods in Table 1 has been brought up to date. The recommended names, in accordance with BS2474 “Recommendations for names for chemicals used in industry”, for the c
7、hemicals having the formulae H 3 BO 3and B 2 O 3are, respectively, “orthoboric acid” and “diboron trioxide”. The names “boric acid” and “boric oxide” are now non-preferred but may still appear in place of the recommended names in earlier parts of BS5688 and in other BritishStandards. The titles of n
8、ew Parts of this standard have been altered to incorporate the recommended terms. General introduction For some years the United Kingdom has participated in the work of preparing methods of test applicable to these materials, organized by Subcommittee8, Boric acid, boric oxide, borates, perborates,
9、of Technical Committee47, Chemistry, of the International Organization for Standardization(ISO). After international agreement has been reached on each of the methods, they have been published, without alteration, as separate Parts of this BritishStandard. Table 1 lists the published test methods an
10、d summarizes their fields of application. Subsequent International Standards in the series, if approved by the UK, will be published as further Parts of this BritishStandard. Ethanol. The ethanol required for the preparation of certain reagents in some of the test methods may be replaced for these p
11、urposes by industrial methylated spirits, of the same strength, complying with BS3591. It should be noted that the use of industrial methylated spirits is governed by the Methylated Spirits Regulations,1983(S.I.1983 No.252). It is not permissible to use duty-free ethanol, received under the provisio
12、ns of the Alcoholic Liquor Duties Act1979, Section10, for purposes for which Industrial Methylated Spirits is an acceptable alternative to ethanol. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
13、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 andii, page1 and a back cover. This standard has been updated (see copyright date) and may have had amendme
14、nts incorporated. This will be indicated in the amendment table on the inside front cover.BS5688-0:1986 BSI 12-1999 1 Table 1 Methods of test included in BS5688 BS5688 Part no. Corresponding International Standard ISOno. Determination of Type of determination Applicable to Orthoboric acid diBoron tr
15、ioxide diSodium tetraborates Sodium perborates Crude sodium borates 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 1914:1972 1915:1972 1916:1972 1917:1972 1918:1972 2214:1972 2215:1972 2216:1972 2218:1972 2217:1975 2760:1975 2761:1975 3118:1976 3119:1976 3120:1976 3121
16、:1976 3122:1976 3123:1976 3124:1976 3125:1976 3424:1975 5932:1980 5933:1980 5934:1980 5936:1980 5937:1980 5935:1984 6918:1984 6920:1984 Orthoboric acid content diBoron trioxide content Sodium oxide and diboron trioxide contents and loss on ignition Sodium oxide, diboron trioxide and available oxygen
17、 contents Sulphur compounds Manganese content Copper content Sodium oxide and diboron trioxide contents Loss in mass after heating at900 C Matter insoluble in alkaline medium and preparation of test solutions Total aluminium content Total titanium content Particle size distribution Chromium content
18、Water content Chloride content Total iron content Rate of solution Alkali-soluble iron content Alkali-soluble aluminium content Bulk density Cobalt content Nickel content Alkali-soluble copper and manganese contents Carbonate content Degree of attrition Total and alkali-soluble silica contents Total
19、 and alkali-soluble calcium and magnesium contents Total and alkali-soluble calcium and magnesium contents Titrimetric Titrimetric Titrimetric/gravimetric Titrimetric Titrimetric Spectrometric Spectrometric Titrimetric Titrimetric Spectrometric Mechanical sieving Spectrometric Gravimetric Mercurimet
20、ric Spectrometric Conductivity Spectrometric Titrimetric Spectrometric Spectrometric Spectrometric Gravimetric Spectrometric Atomic absorption Titrimetric a a Alkali-soluble nickel content.BS5688-0: 1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent n
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