EN ISO 20565-1:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YLQChemische Analyse von chromhaltigen feuerfesten Erzeugnissen und chromhaltigen Rohstoffen (Alternative zum Röntgenfluoreszenzverfahren) - Teil 1: Geräte, Reagenzien, Aufschluss und gravimetrische Bestimmung von Silicium(IV)-oxid (ISO 20565-1:2008)Analyse chimique des produits réfractaires contenant du chrome et des matériaux bruts contenant du chrome (méthode alternative a la méthode par fluorescence de rayons X) - Partie 1: Appareillage, réactifs, dissolution et teneur en silice par gravimétrie (ISO 20565-1:2008)Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the x-ray fluorescence method) - Part 1: Apparatus, reagents, dissolution and gravimetric silica (ISO 20565-1:2008)81.080Ognjevzdržni materialiRefractories71.040.40Kemijska analizaChemical analysisICS:Ta slovenski standard je istoveten z:EN ISO 20565-1:2008SIST EN ISO 20565-1:2009en01-april-2009SIST EN ISO 20565-1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 20565-1December 2008ICS 81.080 English VersionChemical analysis of chrome-bearing refractory products andchrome-bearing raw materials (alternative to the X-rayfluorescence method) - Part 1: Apparatus, reagents, dissolutionand determination of gravimetric silica (ISO 20565-1:2008)Analyse chimique des produits réfractaires contenant duchrome et des matières premières contenant du chrome(méthode alternative à la méthode par fluorescence derayons X) - Partie 1: Appareillage, réactifs, mise en solutionet détermination de la teneur en silice par gravimétrie (ISO20565-1:2008)Chemische Analyse von chromhaltigen feuerfestenErzeugnissen und chromhaltigen Rohstoffen (Alternativezum Röntgenfluoreszenzverfahren) - Teil 1: Geräte,Reagenzien, Aufschluss und gravimetrische Bestimmungvon Silicium(IV)-oxid (ISO 20565-1:2008)This European Standard was approved by CEN on 8 November 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 20565-1:2008: ESIST EN ISO 20565-1:2009

Reference numberISO 20565-1:2008(E)© ISO 2008
INTERNATIONAL STANDARD ISO20565-1First edition2008-12-01Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) —
Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica Analyse chimique des produits réfractaires contenant du chrome et des matières premières contenant du chrome (méthode alternative à la méthode par fluorescence de rayons X)
— Partie 1: Appareillage, réactifs, mise en solution et détermination de la teneur en silice par gravimétrie
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ISO 2008 All rights reserved. Unless otherwise specified, 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
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ii © ISO 2008 – All rights reserved
ISO 20565-1:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.2 3 Terms and definitions.2 4 Apparatus.2 5 Reagents.3 5.1 Stock reagents.3 5.2 Indicators.5 5.3 Standard solutions.6 6 Sample preparation.11 7 Basic procedure.12 8 Determination of loss on ignition (gravimetric).12 9 Decomposition of the sample and preparation of solutions used in the analysis.12 9.1 General decomposition techniques.12 9.2 Dissolution methods by fusion.12 9.3 Dissolution methods by hydrofluoric acid attack.14 9.4 Separation methods by ion-exchange.16 10 Calculation and expression of test results.19 11 Examination and adoption of test results.19 12 Test report.19 Annex A (informative)
References for stock solutions and blank solutions in ISO 20565-1:2008.20
ISO 20565-1:2008(E) iv © ISO 2008 – All rights reserved 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, 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 committees 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 20565-1 was prepared by Technical Committee ISO/TC 33, Refractories, in collaboration with Technical Committee CEN/TC 187, Refractory products and materials. ISO 20565 consists of the following parts, under the general title Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method): ⎯ Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica ⎯ Part 2: Wet chemical analysis ⎯ Part 3: Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES)
INTERNATIONAL STANDARD ISO 20565-1:2008(E) © ISO 2008 – All rights reserved 1Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) —
Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica 1 Scope This part of ISO 20565 specifies methods for the chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials, using traditional (“wet”) methods, ICP-AES spectrometry and FAAS spectrometry. It covers apparatus, reagents, dissolution and determination of gravimetric silica. It is applicable in the ranges of determination given in Table 1. ISO 20565 provides alternatives to the X-ray fluorescence (XRF) method given in ISO 12677. Table 1 — Range of determination (% by mass) Component Range SiO2 0,5 to 10 Al2O3 2 to 30 Fe2O3 0,5 to 25 TiO2 0,01 to 1 MnO 0,01 to 1 CaO 0,01 to 3 MgO 15 to 85 Na2O 0,01 to 1 K2O 0,01 to 1 Cr2O3 2 to 60 ZrO2 0,01 to 0,5 P2O5 0,01 to 5 LOI −0,5 to 5 NOTE These values are after the loss on ignition (LOI) has been taken into account. SIST EN ISO 20565-1:2009

ISO 20565-1:2008(E) 2 © ISO 2008 – All rights reserved 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6353-1, Reagents for chemical analysis — Part 1: General test methods ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series ISO 6353-3, Reagents for chemical analysis — Part 3: Specifications — Second series ISO 26845:2008, Chemical analysis of refractories — General requirements for wet chemical analysis, atomic absorption spectrometry (AAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) methods 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 26845 apply. 4 Apparatus Use normal laboratory apparatus and the following. NOTE Other apparatus is defined in ISO 26845. 4.1 Polyethylene tetrafluoride beaker, 200 ml. Heat in nitric acid for at least 2 h and wash in water. Instead of a polyethylene tetrafluoride beaker, a 150 ml platinum dish may be used. 4.2 Volumetric flasks, 100 ml each, made of plastics material as appropriate for each solution, calibrated as follows. Wash the plastic flask and stand it to dry naturally, or wash it with water, ethanol and diethylether and dry it by sending air into it. Cut the 20 graduations off a sheet of section paper (1 mm2) into a strip and attach it on the marked line of the plastic flask with the central line of the paper. Weigh the flask to the nearest milligram. Pour water (at a temperature approximately equal to the room temperature) up to the
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