BS ISO BRITISH STANDARD 5068-2:2007 Brown coals and lignites of Determination moisture content- Part 2:Indirect gravimetric method for moisture in the analysis sample ICS 73.040 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO5068-2:2007 National foreword This British Standard was published by BSI.It is the UK implementation of ISO 5068-2:2007. The UK participation in its preparation was entrusted to Technical Committee PTI/16,Solidmineralfuels. A list of organizations represented on PTI/16 can be obtained on request to its secretary. 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 cannot confer i immunity from legal obligations. This British Standard was Amendments issued since publication published under the_authority of the Standards Policy pue Amd. No. Date Comments Strategy Committee on 28 February 2007 OBSI 2007 ISBN 9780580501951 BSISO 5068-2:2007 ISO INTERNATIONAL 5068-2 STANDARD First edition 2007-02-01 Brown coals and lignites Determinationofmoisture content- Part 2: Indirect gravimetric method for moisture in the analysis sample Charbonsbrunset lignites-Determination deI'humidité Partie 2:Methode gravimetrique indirecte pour Ihumidite de I'échantillon d'analyse Reference number ISO 5068-2:2007(E) ISO BS ISO 5068-2:2007 Contents Page Foreword, 1 Scope 2 Normative references. 3 Definitions . 4 Principle.. 5 Reagen .. 6 Apparatus 7 Sample 8 Procedure 9 Expression of result 10 Precision of method... 11 Test repor.... Annex A( informative) Nitrogen-purification train BS ISO 5068-2:2007 Foreword IsO (the International Organization for Standardization)is a worldwide federation of national standards bodies established 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives,Part 2 The main task of technical committes is to prepare International Standards.Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.Publication 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 rights. ISO 5068-2 was prepared by Technical Committee ISO/TC 27,Solid mineral fuels,Subcommitte SC 5, Methods ofanalysis. This first edition of ISO 5068-2,together with ISO 5068-1,cancels and replaces ISO 5068:1983,which has been technically revised. moisture content: —Part 1:lndirect gravimetric method for total moisture Part 2:lndirect gravimetric method for moisture in the analysis sample iv BS ISO 5068-2:2007 Brown coals and lignites-Determination of moisture content Part 2: Indirect gravimetric method for moisture in the analysis sample Scope 1 This International Standard specifies a method for the determination of the moisture content in the analysis sample of brown coals and lignites using an indirect gravimetric method. 2Normative references The following referenced documents are indispensable for the application of this document.For dated references,onlytheeditioncited applies.For undatedreferences,thelatest edition of thereferenced document(including any amendments)applies. determination ofmoisture content andforgeneral analysis 3 Definitions 4 Principle A test portion of the general analysis test sample is dried to constant mass at a temperature of 105℃ to 110C in an atmosphere of nitrogen.The moisture content of the analysis sample is calculated from the