BS ISO 14488-2008 Particulate materials - Sampling and sample splitting for the determination of particulate properties《颗粒材料 颗粒特性的测定用取样和样品分离》.pdf
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1、BRITISH STANDARDBS ISO 14488:2007Particulate materials Sampling and sample splitting for the determination of particulate propertiesICS 19.120g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g
2、60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 14488:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 55636 4National forewordThis British Standard is the UK implementation of ISO 14488:2007.The UK
3、participation in its preparation was entrusted to Technical Committee LBI/37, Particle characterization including sieving.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a c
4、ontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDate CommentsReference numberISO 14488:2007(E)INTERNATIONAL STANDARD ISO14488First edition2007-12-15Particulate m
5、aterials Sampling and sample splitting for the determination of particulate properties Matriaux particulaires chantillonnage et division des chantillons pour la caractrisation des proprits particulaires BS ISO 14488:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative reference
6、s . 1 3 Terms and definitions. 1 4 Abbreviations and symbols. 2 5 Principles of sampling and sample splitting .3 5.1 General. 3 5.2 Fundamental error 4 5.3 Total error/number of samples or increments. 7 6 Sampling plan . 9 7 General procedures 10 7.1 Safety precautions 10 7.2 Primary sampling 10 7.3
7、 Sample handling . 11 7.4 Sample containers 11 7.5 Marking of sample containers . 12 8 Sample division techniques 12 8.1 General. 12 8.2 Spinning riffler 13 8.3 Static riffle divider. 13 8.4 Coning and quartering . 14 8.5 Increment division method 15 8.6 Scoop sampling 16 8.7 Sampling from paste 16
8、8.8 Suspension sampling. 16 9 Validation. 18 Annex A (informative) Calculation of variances at different stages in the sampling sequence 19 Annex B (informative) Estimation of sampling errors and minimum mass of sample . 23 Bibliography . 30 BS ISO 14488:2007iv Foreword ISO (the International Organi
9、zation for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been establishe
10、d has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
11、International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Pub
12、lication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent
13、 rights. ISO 14488 was prepared by Technical Committee ISO/TC 24, Sieves, sieving and other sizing methods, Subcommittee SC 4, Sizing by methods other than sieving. BS ISO 14488:2007vIntroduction The characterization of particle properties like size, form and specific surface area requires very care
14、ful sampling and sample splitting practices to be followed. The distributions of the values of such properties are related to the number of particles, which cannot be increased as in sampling for chemical analysis. Deviations from statistical values occur due to the presence of particles of differen
15、t sizes and shapes for each component in a powder obtained from a sampled mass of powder. BS ISO 14488:2007blank1Particulate materials Sampling and sample splitting for the determination of particulate properties 1 Scope This International Standard specifies methods for obtaining a test sample from
16、a defined bulk of particulate material (powder, paste, suspension or dust) that can be considered to be representative of that bulk with a defined confidence level. It is particularly relevant to the measurement of particle size, size distribution and surface area. 2 Normative references The followi
17、ng referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3165, Sampling of chemical products for industrial use S
18、afety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 9276-2, Representation of results of particle size analysis Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions ISO 14887, Sample preparation Dispersing procedure
19、s for powders in liquids 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 6206 and the following apply. 3.1 bias systematic difference between true (or accepted) value and measured value 3.2 “critical” size class specific size class, whose sampling er
20、ror, in its fractional mass, has a significant influence upon the product properties 3.3 error difference between a measured value and the true value, which may have a random or a systematic nature 3.4 gross sample primary sample, composed of several sample increments 3.5 grab sample sample that has
21、 not been taken under well-defined conditions BS ISO 14488:20072 3.6 primary sample sample (single or composed) taken from a defined bulk product 3.7 representative sample sample that has the same properties as a defined batch of material and represents the bulk material, within a defined confidence
22、 limit 3.8 sample part of a defined bulk product taken for the purpose of characterization 3.9 sample increment single sample, taken from any of a defined set of locations in a bulk product or at any of a defined set of times from a production/transportation line, to be mixed with other increments t
23、o form a gross sample 3.10 sampling sequence sequence of sampling, sample division and combination steps that result in a test sample for a defined bulk product 3.11 spot sample sample, taken at a defined location or production time, from a batch of material 3.12 test sample sample that is entirely
24、used for a property characterization 4 Abbreviations and symbols For the purposes of this document, the following abbreviations and symbols apply. CV coefficient of variation, i.e. standard deviation relative to the corresponding mean value, expressed as fraction or percentage 12,F standard F-distri
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