BS-3406-8-1997 ISO-13321-1996.pdf
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1、BRITISH STANDARD BS 3406-8: 1997 ISO 13321: 1996 Methods for Determination of particle size distribution Part 8: Photon correlation spectroscopy ICS 19.120 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3406-8:1997 This British Standard,
2、 having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 January 1997 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference LBI/37/4 Draf
3、t for comment 94/501507 DC ISBN 0 580 26904 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee LBI/37, Sieves, screens and particle sizing, to Subcommittee LBI/37/4, Sizing by methods other than sieving, upon which the fol
4、lowing bodies were represented: BLWA Ltd. (The Association of the Laboratory Supply Industry) British Fluid Power Association China Clay Association Institution of Chemical Engineers Institution of Electrical Engineers Loughborough University of Technology Ministry of Defence (Defence Research Agenc
5、y) NABIM Royal Pharmaceutical Society of Great Britain Royal Society of Chemistry Society of Chemical Industry University of Bradford Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
6、 3406-8:1997 BSI 11-1998i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Definitions1 3Symbols1 4Principle2 5Apparatus2 6Preliminary procedures2 7Measurement procedure3 8Calibration and validation4 9Repeatability4 10Test report5 Annex A (normative)
7、Computation of the average particle diameter and polydispersity index6 Annex B (informative) Recommended test report form7 Annex C (informative) Theoretical background8 Annex D (informative) Typical PCS instruments and recommended specifications11 Annex E (informative) Recommendations for sample pre
8、paration12 Annex F (informative) BibliographyInside back cover Figure D.1 Typical set-up of a PCS instrument11 Figure E.1 Solvent filtration, small quantities13 Figure E.2 Water filtration, large quantities14 Figure E.3 Water purification: deionization, distillation, filtration15 Licensed Copy: shef
9、fieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3406-8:1997 ii BSI 1998 National foreword This Part of BS 3406 has been prepared by Subcommittee LBI/37/4. It is identical with ISO 13321:1996, Particle size analysis Photon correlation spectroscopy, published
10、 by the International Organization for Standardization (ISO). ISO 13321 was prepared by Subcommittee 4 of Technical Committee ISO/TC 24, with the active participation and approval of the United Kingdom. This Part of BS 3406 is one of a series of methods for determining the size distribution of parti
11、cles. Other Parts of BS 3406 are: Part 1: Guide to powder sampling; Part 2: Recommendations for gravitational liquid sedimentation methods for powders and suspensions; Part 3: Air elutriation methods (obsolescent); Part 4: Guide to microscope and image analysis methods; Part 5: Recommendations for e
12、lectrical sensing zone method (the Coulter principle); Part 6: Recommendations for centrifugal liquid sedimentation methods for powders and suspensions; Part 7: Recommendations for single particle light interaction methods; Part 9: Recommendations for the filter blockage method (mesh obscuration)1).
13、 The particle size distribution of a powder is an important basic property that can distinguish it from other samples of the same composition. Vast quantities of powdered materials are sold or processed and specifications often include average particle size and/or particle size distribution. Even wh
14、en other bulk properties are specified, compliance with the specification may be achieved by varying the particle size distribution. Particle size analysis is also used extensively to monitor environmental conditions and in numerous areas of scientific research. In all these contexts the reproducibi
15、lity and comparability of results is of paramount importance and the use of standardized techniques is essential. Representative sampling and correct dispersion of particulate material are prerequisites for the determination of size distribution. The procedures described in BS 3406-1 have been selec
16、ted to give test portions representative of the bulk. The many techniques used to measure particle size distribution vary both in principle and in degree of technical complexity and automation. In principle, any property that depends on particle size can be used as a means of measuring it. In practi
17、ce, the methods widely used are both experimentally convenient and based upon a physical principle having a well-defined relationship to particle size. The choice of the most suitable method will depend on the following considerations: a) the purpose for which the analysis is required, e.g. quality
18、control, research, specification requirements; b) the size range and other properties of the particles, e.g. density, solubility, refractive index; c) aggregation and dispersion characteristics of the powder; d) the amount of material available for analysis; e) the method by which the sample has bee
19、n collected; f) the conditions under which the powder is to be used, e.g. the state of dispersion; g) the resources available. 1) In preparation. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3406-8:1997 BSI 11-1998 iii It has been assu
20、med in the preparation of this Part of BS 3406 that the execution of its provisions is entrusted to appropriately qualified and experienced people. It is expected that users of the standard will be conversant with the appropriate measuring instrument manufacturers instruction manual. WARNING. This B
21、ritish Standard may involve the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. In particular, attention
22、 is drawn to the Health and Safety Executive Control of Substances Hazardous to Health (COSHH) Regulations (1994). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Br
23、itish 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 16, an Inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendment
24、s incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:54:25 GMT+00:00 2006, Uncontrolled Co
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