BS-3473-5-1987 ISO-1776-1985.pdf
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1、BRITISH STANDARD BS 3473-5: 1987 ISO 1776:1985 Chemical resistance of glass used in the production of laboratory glassware Part 5: Method for determination of resistance of glass to attack by 6 mol/L hydrochloric acid at 100 C ISO title: Glass Resistance to attack by hydrochloric acid at 100 C Flame
2、 emission or flame atomic absorption spectrometric method UDC 666.11.01.620.193.41:542.231 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:09:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3473-5:1987 This British Standard, having been prepared under the direction of the Laboratory Appar
3、atus Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 January 1987 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference LBC/8 Draft for comment 82/55517 DC ISBN 0 580 15331 2 Committees responsible for
4、 this British Standard The preparation of this British Standard was entrusted by the Laboratory Apparatus Standards Committee (LBC/-) to Technical Committee LBC/8, upon which the following bodies were represented: British Glass Industry Research Association Glass Manufacturers Federation Society of
5、Glass Technology Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:09:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3473-5:1987 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1
6、 2Field of application1 3References1 4Principle1 5Reagents1 6Apparatus2 7Preparation of sample pieces2 8Procedure3 9Expression of results4 10Test report4 Annex Example of a procedure for purifying hydrochloric acid solution5 Figure 1 Beaker with rack to hold samples during the preliminary acid treat
7、ment2 Figure 2 Preparation of hydrochloric acid solution, c(HCl) = 6 mol/l, with very low sodium oxide content5 Table Permissible range of the values obtained4 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:09:35 GMT+00:00 2006, Uncontrolled Copy,
8、 (c) BSI BS 3473-5:1987 ii BSI 12-1999 National foreword This Part of BS 3473 has been prepared under the direction of the Laboratory Apparatus Standards Committee. It is identical with ISO 1776:1985 “Glass Resistance to attack by hydrochloric acid at 100 C Flame emission or flame atomic absorption
9、spectrometric method” published by the International Organization for Standardization (ISO). It has been prepared by subcommittee 5 of Technical Committee TC 48, Laboratory glassware and related apparatus, with the active participation and approval of the UK. This edition of ISO 1776 is based on ISO
10、 Recommendation 1776:1970. BS 3473 was first published in 1962 as a single publication which described procedures for determining the resistance of glass used in the production of laboratory glassware to attack by a boiling aqueous solution of mixed alkali, and to water at 100 C and 121 C. To facili
11、tate alignment with corresponding International Standards, the revision of BS 3473 was begun in 1982 with the publication of the first three Parts of what was then intended to be a six-Part standard. Part 6, which was to deal with classification, will not now be issued as it has been agreed internat
12、ionally to include classification in the individual test methods. BS 3473 currently consists of the following Parts: Part 1: Method for determination of resistance of glass to attack by a boiling aqueous solution of mixed alkali; (Identical with ISO 695:1984) Part 2: Method for determination of hydr
13、olytic resistance of glass grains at 98 C; (Identical with ISO 719:1985) Part 3: Method for determination of hydrolytic resistance of glass grains at 121 C; (Identical with ISO 720:1985) Part 4: Method for determination of hydrolytic resistance of the interior surfaces of glass containers; (Identica
14、l with ISO 4802:1982) Part 5: Method for determination of the resistance of glass to attack by 6 mol/L hydrochloric acid at 100 C. (Identical with ISO 1776:1985) The procedures described in BS 3473 are recommended as being capable of yielding consistent results in the hands of independent workers in
15、 different laboratories and offer a means of assessing the chemical resistance of glass used in the production of laboratory ware when tested by the specified procedure. Because the term “laboratory glassware” covers a wide variety of articles to serve many different purposes and the glass types use
16、d include both borosilicate and soda-lime-silica glass, methods of test are required which are widely applicable. Tests of fractured surfaces, such as the grain test described in Parts 2 and 3, give an assessment of the chemical behaviour of the body of the glass and can be applied to articles of la
17、boratory glassware because they are usually used many times. Such tests have a more limited value for assessing the chemical resistance of glass articles which are to be used once only because the resistance depends more on the condition of the surface than on the body of the glass; BS 3473-4 relate
18、s to such applications. It should be realized that whilst these procedures can be used to assess the behaviour of glass under the stated conditions, and thus to select glasses for general laboratory purposes, they can only reveal or measure limited aspects of chemical behaviour. Where articles are d
19、esigned for a specific purpose, it is essential that the performance of the glass should be evaluated in terms of precise service requirements by using simulative or functional tests. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as
20、 a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 08:09:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3473-5
21、:1987 BSI 12-1999iii The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. The symbol “l” has been used for litre (and in its submultiples). In British Standards it is current practice to use the symbol “L”
22、. Wherever the words “International Standard” appear, referring to this standard, they should be read as “this Part of BS 3473”. CAUTION. Attention is drawn to the Health and Safety at Work etc. Act 1974, and the need for ensuring that the method of test specified in this standard is carried out wit
23、h suitable precautions. The procedure described in this standard method is intended to be carried out by qualified chemists or other suitably trained and/or supervised personnel. Normal safety precautions should be observed throughout the use of the method. Particular attention is drawn to the need
24、to wear suitable eye-protectors during the preparation and handling of glass fragments; see BS 2092 “Industrial eye-protectors” for details of suitable types. ISO 3696 and ISO 3819, to which reference is made in the text, are in the course of preparation. Pending publication of these International S
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