ISO-4688-1-2006.pdf
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1、 Reference number ISO 4688-1:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 4688-1 Second edition 2006-03-15 Iron ores Determination of aluminium Part 1: Flame atomic absorption spectrometric method Minerais de fer Dosage de laluminium Partie 1: Mthode par spectromtrie dabsorption atomique dans la flam
2、me Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:52:10 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4688-1:2006(E) PDF disclaimer This PDF f
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5、creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. U
6、nless 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 ISOs member body in the country of the requester. IS
7、O copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=
8、NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:52:10 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4688-1:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Principle. 1 4 Reagents 2 5 Appara
9、tus 2 6 Sampling and samples. 3 6.1 Laboratory sample 3 6.2 Preparation of predried test samples. 3 7 Procedure 3 7.1 Number of determinations. 3 7.2 Test portion. 4 7.3 Blank test and check test. 4 7.4 Determination 4 8 Expression of results . 6 8.1 Calculation of mass fraction of aluminium 6 8.2 G
10、eneral treatment of results 6 8.3 Oxide factor. 8 9 Test report . 8 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples 9 Annex B (informative) Derivation of repeatability and permissible tolerance equations. 10 Annex C (informative) Precision data
11、 obtained by international analytical trials . 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:52:10 MDTNo reproduction or networking permitted without license from IHS -,-
12、,- ISO 4688-1:2006(E) iv ISO 2006 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.
13、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 Internat
14、ional 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 Stand
15、ards 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 subjec
16、t of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4688-1 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. This second edition cancels and replaces the first edition (ISO 4688
17、-1:1992), which has been technically revised. It has been updated to alter the manner in which precision data are presented. ISO 4688 consists of the following parts, under the general title Iron ores Determination of aluminium : Part 1: Flame atomic absorption spectrometric method Copyright Interna
18、tional Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 07:52:10 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 4688-1:2006(E) ISO 2006 All rights re
19、served 1 Iron ores Determination of aluminium Part 1: Flame atomic absorption spectrometric method WARNING This part of ISO 4688 may involve hazardous materials, operations and equipment. This part of ISO 4688 does not purport to address all of the safety problems associated with its use. It is the
20、responsibility of the user of this part of ISO 4688 to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use. 1 Scope This part of ISO 4688 specifies a flame atomic absorption spectrometric method for the determination of the mass fr
21、action of aluminium in iron ores. This method is applicable to mass fractions of aluminium between 0,1 % and 5,0 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products. 2 Normative references The following referenced documents are indispensable for the application
22、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 648, Laboratory glassware One-mark pipettes ISO 1042, Laboratory glassware One-mark volumetric flasks ISO 3082, Iron o
23、res Sampling and sample preparation procedures ISO 7764, Iron ores Preparation of predried test samples for chemical analysis 3 Principle The test portion is decomposed by treatment with hydrochloric acid and a small amount of nitric acid. The mixture is evaporated to dehydrate silica, followed by d
24、ilution and filtration. The residue is ignited and silica is removed by evaporation with hydrofluoric and sulfuric acids. The residue is then fused with sodium carbonate and the cooled melt is dissolved in the filtrate. The solution obtained is aspirated into the flame of an atomic absorption spectr
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