BS-3338-8-1961.pdf
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1、BRITISH STANDARD BS 3338-8: 1961 Method for The determination of bismuth in ingot tin, tin-lead solders and white metal bearing alloys (Photometric method) Methods for the sampling and analysis of tin and tin alloys Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:54:22 GMT+00:00 2006, Unco
2、ntrolled Copy, (c) BSI BS 3338-8:1961 This British Standard, having been approved by the Non-ferrous Metals Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council on 29 April 1961 BSI 12-1999 The follo
3、wing BSI references relate to the work on this standard: Committee references NFE/27, NFE/27/1 Draft for comment AA(NFE)1388 ISBN 0 580 03087 3 Co-operating organizations The Non-ferrous Metals Industry Standards Committee, under whose supervision this British Standard was prepared, consists of repr
4、esentatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with
5、the preparation of this British Standard: Admiralty*Institution of Mining and Metallurgy Aluminium Development AssociationInstitution of Structural Engineers Aluminium Industry CouncilLead Development Association Association of Bronze and Brass FoundersLead Sheet and Pipe Manufacturers Association o
6、f Consulting Engineers,Federation (Incorporated)Light Metal Founders Association British Bronze and Brass Ingot Manufacturers London Metal Exchange* AssociationMagnesium Industry Council British Electrical and Allied Manufacturers Ministry of Aviation* Association*National Brassfoundry Association B
7、ritish Non-ferrous Metals FederationNon-ferrous Metal Stockists British Non-ferrous Metals Research Post Office* Association*Royal Institute of British Architects Cable Makers Association*Society of British Aircraft Constructors Copper Development AssociationSociety of Motor Manufacturers and Crown
8、Agents for Oversea Governments and Traders Ltd.* AdministrationsTin Research Institute* High Commission of IndiaWar Office* High Conductivity Copper AssociationZinc Development Association Institute of British FoundrymenIndividual manufacturers Institute of Metals Institution of Mechanical Engineers
9、 (Automobile Division) British Railways, The British Transport London Transport Executive, The British CommissionTransport Commission British Tin Box Manufacturers FederationSolder Makers Association Electronic Engineering AssociationTinplate Conference (1925) Gas CouncilTin Producers Association In
10、stitution of Gas EngineersIndividual firms Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:54:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3338-8:1961 BSI 12-1999i Contents Page Co-operating organizationsInside front cover Forewo
11、rdii Introduction1 Apparatus1 Solutions required1 Sampling1 Procedure1 Calibration1 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:54:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3338-8:1961 ii BSI 12-1999 Foreword This standard makes reference to the following British Standard: BS 33
12、38-1, Sampling of ingot tin. BS 3338-12, Sampling of solders. BS 3338-14, Sampling of white metal bearing alloys1). This method for the determination of bismuth in ingot tin, tin-lead solders and white metal bearing alloys is the eighth of a series of methods which will form a complete British Stand
13、ard under the collective title “Methods for the sampling and analysis of tin and tin alloys”, each method being published as a separate part. The preparation of this series of methods has been authorized by the Non-ferrous Metals Industry Standards Committee as part of a general programme for the st
14、andardization of methods for the sampling and analysis of non-ferrous metals. Other methods in the series are as follows: Part 1: Sampling of ingot tin; Part 2: Determination of tin in ingot tin; Part 3: Determination of antimony in ingot tin; Part 4: Determination of copper in ingot tin and tin-lea
15、d solders; Part 5: Determination of lead in ingot tin and tin-antimony solders; Part 6: Determination of copper in high purity ingot tin; Part 7: Determination of silver in solders; Part 9: Determination of arsenic in ingot tin, tin-lead solders and white metal bearing alloys; Part 10: Determination
16、 of iron in ingot tin, tin-lead solders and white metal bearing alloys; Part 11: Determination of tin in solders; Part 12: Sampling of solders. The complete British Standard Methods will be found suitable for the grades of metals covered by BS 3252, “Ingot tin”, BS 219, “Soft solders” and BS 3332, “
17、White metal bearing alloy ingots”. In the methods for determining impurities, sample weights and aliquots have been chosen to cover the range of impurity content usually found in commercial tin ingots, solders and white metal bearing alloy ingots. For amounts of impurity outside this range, sample w
18、eights or aliquots should be adjusted accordingly. The methods have been found to give reliable and reproducible results, and while in some instances they may appear to be lengthy, it should be realized that they are put forward as “referee” methods to be used in cases of dispute. In the preparation
19、 of the calibration graphs an attempt has been made to define concentrations, but because these are linked with the particular instrument used for determining optical density they should be used only as a guide. A British Standard does not purport to include all the necessary provisions of a contrac
20、t. Users of British Standards are responsible for their correct 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, pages i and ii, page 1 and a back cover. This stan
21、dard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In course of preparation. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 07:54:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 333
22、8-8:1961 BSI 12-19991 Introduction a) Principle. Bismuth is determined photometrically with thiourea after removal of tin and antimony as bromides in the presence of perchloric acid. b) Range. Up to 0.07 per cent bismuth (Note 1). c) Reproducibility. 10 per cent of bismuth present. Apparatus a) Any
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