BS-7709-1-1993 ISO-10136-1-1993.pdf
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1、BRITISH STANDARD BS 7709-1: 1993 ISO 10136-1: 1993 Analysis of extract solutions of glass Part 1: Method for determination of silicon dioxide by molecular absorption spectrometry UDC 666.11/.18.01.2:543.422:546.284-31 Licensed Copy: London South Bank University, London South Bank University, Fri Dec
2、 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7709-1:1993 This British Standard, having been prepared under the direction of the Laboratory Apparatus Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 BSI 11-19
3、99 The following BSI references relate to the work on this standard: Committee reference LBC/36 Draft for comment 90/56734 DC ISBN 0 580 22277 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Laboratory Apparatus Standards Policy Commit
4、tee (LBC/-) to Technical Committee LBC/36, upon which the following bodies were represented: Association for Science Education BLWA Ltd. (The Association of the Laboratory Supply Industry) British Glass Manufacturers Confederation CLEAPSS School Science Service Department of Trade and Industry (Labo
5、ratory of the Government Chemist) Institute of Medical Laboratory Sciences The following body was also represented in the drafting of the standard, through a subcommittee: Society of Glass Technology Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University
6、, London South Bank University, Fri Dec 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7709-1:1993 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative references1 3Definitions2 4Principle2 5Reagents2 6Apparatus3 7Samplin
7、g and samples3 8Procedure4 9Expression of results4 10Test report4 Annex A (informative) Bibliography5 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7709-1:1993 ii BSI 11
8、-1999 National foreword This Part of BS 7709 has been prepared under the direction of the Laboratory Apparatus Standards Policy Committee and is identical with ISO 10136-1:1993 Glass and glassware Analysis of extract solutions Part 1: Determination of silicon dioxide by molecular absorption spectrom
9、etry, published by the International Organization for Standardization (ISO). ISO 10136-1 has been prepared by Subcommittee 5 of Technical Committee ISO/TC 48, with the active participation and approval of the UK. BS 7709 is published in six Parts as follows: Part 1: Method for determination of silic
10、on dioxide by molecular absorption spectrometry; Part 2: Method for determination of sodium oxide and potassium oxide by flame spectrometric methods; Part 3: Method for determination of calcium oxide and magnesium oxide by flame atomic absorption spectrometry; Part 4: Method for determination of alu
11、minium oxide by molecular absorption spectrometry; Part 5: Method for determination of iron(III) oxide by molecular absorption spectrometry and flame atomic absorption spectrometry; Part 6: Method for determination of boron(III) oxide by molecular absorption spectrometry. BS 2649 Methods for analysi
12、s of glass Part 1:1988 Glasses of the soda-lime-magnesia-silica type and Part 3:1988 Glasses of the potassium oxide-lead oxide-silica type describe methods of determination primarily of the gravimetric type. The methods given in BS 7709 should be considered complementary to those of BS 2649. The Tec
13、hnical Committee has reviewed the provisions of ISO 385-2, ISO 648, ISO 835-3, ISO 6955 and ISO 7056, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. Cross-references International StandardCorresponding British Sta
14、ndard BS 700 Graduated pipettes ISO 835-1:1981Part 1:1982 Specification for general requirements (Identical) ISO 835-2:1981Part 2:1982 Specification for pipettes for which no waiting time is specified (Identical) ISO 1042:1983BS 1792:1982 Specification for one-mark volumetric flasks (Identical) ISO
15、3585:1991BS 2598 Glass plant, pipeline and fittings Part 1:1991 Specification for properties of borosilicate glass 3.3 (Identical) ISO 3696:1987BS 3978:1987 Specification for water for laboratory use (Identical) ISO 3819:1985BS 6523:1984 Specification for glass beakers for laboratory use (Technicall
16、y equivalent) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7709-1:1993 BSI 11-1999iii This British Standard describes a method of test only and should not be used or quoted as a specification defining lim
17、its of performance. Reference to this British Standard should indicate that the method of test used is in accordance with BS 7709-1:1993. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicatio
18、n. 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, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and
19、may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank Universit
20、y, London South Bank University, Fri Dec 08 13:34:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7709-1:1993 BSI 11-19991 Introduction The determination of silica (SiO2) in durability extract solutions has not, hitherto, been included in classifications of glass or glassware according to chemical
21、resistance. Indeed, in many applications the concentrations of silica found in such extract solutions, normally very low, are not significant and are of little interest. There are occasions where such releases could be important, for example from glassware used in the determination of small concentr
22、ations of silica in solutions or, in some cases, releases from medical and pharmaceutical ware. Then again, in examining the properties of new glass compositions it could be an advantage to know the full analysis of the durability extract solutions. Technical Committee 2, Chemical Durability and Ana
23、lysis, of the International Commission on Glass (ICG), investigated two procedures for determining silica (see 6 in Annex A) by the molecular absorption spectrometric technique. Both were based on the formation of colour complexes in the presence of ammonium molybdate, one using the yellow colour of
24、 the complex formed, the other using the blue colour produced when a suitable reducing agent is added. In collaborative experimental work, twelve laboratories analysed silica in two synthetic solutions and in extract solutions produced by the test described in ISO 480234. It was agreed that whilst d
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