BRITISH STANDARD BS ISO. 9276-5:2005 Representation of results of particle size analysis Part 5: Methods of calculation relating to particle size analyses using logarithmic normal probability distribution ICS 19.120 BSi British Standards BSISO9276-5:2005 National foreword This British Standard reproduces verbatim ISO9276-5:2005and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee LBl/37, Sieves, screens and particle sizing, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitorrelated international and Europeandevelopments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may befound in the BSi Catalogue underthe section entitled "International Standards Correspondence Index",or by using the“Search" facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises afront cover,an inside frontcover, the isO titlepage, pages i to v,ablankpage,pages 1to 12,an insideback cover and a back cover. document was last issued. Amendments issued sincepublication This British Standard was ee published under the authority Amd. No. Date Comments of the Standards Policy and Strategy Committee on29 September 2005 BSI29September2005 ISBN 0 580 46573X INTERNATIONAL ISO STANDARD 9276-5 First edition 2005-08-01 BSISO9276-5:2005 Representation of results of particle size analysis Part 5: Methods of calculation relating to particle size analyses using logarithmic normal probability distribution Representationdedonneesobtenuesparanalysegranulométrique- Partie5:MethodesdecalculrelatifaI'analysegranulometriqueaI'aide deladistributiondeprobabilitelogarithmiquenormale Reference number ISO ISO 9276-5:2005(E) ii BSISO9276-5:2005 Contents Page Foreword. iv Introduction 1 Scope. 2 Normative references. 3 Symbols 4 Logarithmicnormalprobabilityfunction. 5 Special valuesofalogarithmicnormalprobabilitydistribution. 5.1 Completekthmoments... 5.2 Averageparticle sizes 5.3 Median particle sizes.. 5.4 Horizontal shiftsbetweenplotteddistributionvalues.. 5.5 Volume-specificsurfacearea(Sauterdiameter) 8 Annex A(informative)Cumulative distribution values of a normalprobability distribution.. Bibliography ili