ISO INTERNATIONAL STANDARD 4552-1 First edition 1987-12-15 INTERNATIONALORGANIZATIONFORSTANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAN OPrAHW3ALMH O CTAHAAPTM3ALMN Ferroalloys'- Sampling and sample preparation for chemical analysis Part 1: Ferrochromium, ferrosilicochromium, ferrosilicon, ferrosilicomanganese,ferromanganese Ferro-alliages --- Echantillonnage et preparation des échantllons pour analyse chimique - Partie 1: Ferro-chrome, ferro-silico-chrome, ferro-silicium, ferro-silico-manganese, ferro- manganese Referencenumber ISO 4552-1:1987 (E) No reproduction or networking permitted without license from IHS Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of nationai standards bodies (IsO member bodies). The work of preparing International Standardsis normally carried out throughIsO technical committees.Eachmember bodyinterested ina subjectforwhichatechnical committeehasbeenestablishedhas the right to be represented on that committee. International organizations, govern- mental and non-governmental,in liaisonwithIso,alsotakepart inthework. Draft International Standards adopted by the technical committees are circulated to ithe 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 4552-1 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 latest edition, unless otherwise stated. @ International Organization for Standardization, 1987 Printed in Switzerland i Copyright International Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale ISO 4552-1 : 1987 (E) Contents Page Scope and field of application . 2 Reference 3 General requirements 3.1 Definitions, general requirements for sampling and sample preparation,toolsandequipment 3.2 Quality characteristics for precision requirements . Overall precision of the determination of the chemical composition of a consignment 5Sampling 2 5.1Massofincrement. 5.2 Number of increments and precision of sampling . 2 5.3 Method of increment sampling 3 5.4Gross sample 6 Sample preparation. 6.1 Precision of sample preparation 6.2 Sample division 4 6.3Crushing and mixing 7 Testsample 8 Bibliography Annex Initial data for calculation of sampling parameters A.1 Number of increments taken from one consignment. A.2 Overall precision of the determination of the chemical composition of a consignment, βsDM .. No reproduction or networking permitted without