ISO INTERNATIONAL STANDARD 4552-2 First edition 1987-12-15 INTERNATIONALORGANIZATIONFOR STANDARDIZATION ORGANISATIONINTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAA OPTAHV3ALMH O CTAHAAPTW3ALWM Ferroalloys '- Sampling and sample preparation for chemical analysis Part 2: Ferrotitanium, ferromolybdenum, ferrotungsten, ferroniobium, ferrovanadium Ferro-alliages - Echantillonnage et preparation des échantillons pour-analyse chimique Partie 2: Ferro-titane, ferro-molybdene, ferro-tungstene, ferro-niobium, ferro-vanadium Referencenumber ISO 4552-2 : 1987 (E) Standardizatiol No reproduction or networking permitted without license from IHS 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 mental and non-governmental, in liaison with Iso, also take part in the work. 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. International Standard ISO 4552-2 was prepared by Technical Committee ISO/TC 132, Ferroalloys. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latestedition,unlessotherwisestated. International OrganizationforStandardization,1987 Printed in Switzerland i CopyrightInternalionalOrganizationfor Standardizatior No reproduction or networking permitted without license from IHS Not for Resale ISO 4552-2 : 1987 (E) Contents Page Scopeandfieldofapplication References 3 General requirements. 3.1 Definitions, general requirements for sampling and sample preparation, tools and equipment. 3.2 Quality characteristics for precision requirements . Overall precision of the determination of the chemical composition of a consignment.. Sampling 2 Massofincrement 2 5.2 Number of increments and precision of sampling 2 5.3 Method of increment sampling 3 5.4 Gross sample 3 6 Sample preparation. 3 6.1 Precision of sample preparation 3 6.2 Sampledivision 3 6.3 Crushing and mixing 7 Testsample 8 Bibliography Annex Initial data for calculation of sampling parameters 5 A.1 Number of increments taken from one consignment. 5 A.2 Overall precision of the determination of the chemical composition of aconsignment ii No reproduction or networking permitted without license from IHS Not for Resale