ISO INTERNATIONAL STANDARD 6154 First edition 1989-09-01 Chromium ores -- Preparation of samples Minerais de chrome - Preparation des échantillons Reference number ISO 6154 : 1989 (E) Copyright In No reproduc Iction or networking permitted without I Not for Resal ISO6154:1989 (E) Foreword Iso (the International Organization 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 established has the right to be represented on that committee. International organizations, govern- mental and non-governmental,inliaisonwithIso,alsotakepart inthework.Iso collaborates closely with the International Electrotechnical Commission (IEC) on all mattersofelectrotechnicalstandardization Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with Iso procedures. requiring at least 75 % approval by the member bodies voting. Internationa! Standard ISO 6154 was prepared by Technical Committee ISO/TC 65, Manganese and chromium ores. Annex A forms an integral part of this International Standard, ISO 1989 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher, International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 Switzerland d without license from IHS Not for Resale INTERNATIONALSTANDARD ISO 6154 : 1989 (E) Chromium ores -- Preparation of samples Scope 3.4 sub-sample: This International Standard specifies the methods of preparing (1)Aquantity ofan ore consisting of two ormore increments samplesofchromiumoresfordeterminingthe chemical com takenfromaconsignment position and moisture content of a consignment. The methods are applicable to all chromium ores, whether natural or pro- (2)An aggregation of two or more increments each of which cessed. has been optionally crushed and/or.optionally divided as necessary. 2 Normative references The following standards contain provisions which, through 3.5 grosssample: reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated (1) The quantity of an ore consisting of all the increments were valid.All standards are subject to revision,and partiesto taken from a consignment. agreemerits based on this International Standard are encour. aged toinvestigate the possibility of applying the most recent (2) An aggregation of all the increments or all the sub- editions of the standards listed below. Members of IEC and ISO samples each of which has been optionally crushed and/or op- maintain registers of currently valid International Standards. tionally divided as necessary. IS0565:1983,Testsieves-Wovenmetalwirecloth,per farated plate and electroformed sheet - Nominal sizes of 3.6 divided sample : A sampie obtained by a method of openings. division. Iso 6153 : 1989, Chromium ores -- Increment sampling. 3.7 test sample : Any sample for the determination of 3Definitions moisture content or chemical composition, which is prepared from each increment, each sub-sample, or from the gross For the purposes of this International Standard, the following sampleinaccordancewiththespecifiedmethodforthattype definitions apply. of sample. 3.1 lot : A definite quantity of an ore, processed or produced Arepresentativepartofatestsamplewhichisactuallysub under conditions which are presumed uniform. jected to the method mentioned above is designated "test por. tion". If the entire quantity of a test sample is subjected to the 3.2 consignment : A quantity. of an ore delivered at one test, the test sam