ISO 9682-2-2006 Iron ores - Determination of manganese content - Part 2 Periodate spectrophotometric method《铁矿石 锰含量的测定 第2部分 高碘酸盐分光光度法》.pdf
《ISO 9682-2-2006 Iron ores - Determination of manganese content - Part 2 Periodate spectrophotometric method《铁矿石 锰含量的测定 第2部分 高碘酸盐分光光度法》.pdf》由会员分享,可在线阅读,更多相关《ISO 9682-2-2006 Iron ores - Determination of manganese content - Part 2 Periodate spectrophotometric method《铁矿石 锰含量的测定 第2部分 高碘酸盐分光光度法》.pdf(18页珍藏版)》请在麦多课文档分享上搜索。
1、 Reference number ISO 9682-2:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 9682-2 First edition 2006-12-01 Iron ores Determination of manganese content Part 2: Periodate spectrophotometric method Minerais de fer Dosage du manganse Partie 2: Mthode spectrophotomtrique au periodate ISO 9682-2:2006(E) PDF
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4、 to the file; the PDF-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
5、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 ISOs member body in the countr
6、y of the requester. ISO 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 reservedISO 9682-2:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scop
7、e. 1 2 Normative references. 1 3 Principle. 1 4 Reagents 2 5 Apparatus 3 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 Calibration. 4 7.4.1 Sample
8、s containing more than 0,1 % (by mass) of manganese 4 7.4.2 Samples containing less than 0,1 % manganese5 7.5 Determination 5 7.5.1 Decomposition of the test portion 5 7.5.2 Treatment of the residue 6 7.5.3 Treatment of the test solution . 6 7.5.4 Spectrophotometric measurements . 6 8 Expression of
9、results. 7 8.1 Calculation of mass fraction of manganese 7 8.2 General treatment of results 8 8.2.1 Repeatability and permissible tolerance 8 8.2.2 Determination of analytical result. 8 8.2.3 Between-laboratories precision 8 8.2.4 Check for trueness . 9 8.2.5 Calculation of final results. 9 8.3 Oxid
10、e factor. 10 9 Test report. 10 Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for test samples 11 Annex B (informative) Derivation of repeatability and permissible tolerance . 12 Annex C (informative) Precision data obtained by international analytical trials
11、. 13 ISO 9682-2:2006(E) iv ISO 2006 All rights reservedForeword 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.
12、 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 Interna
13、tional 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 Stan
14、dards 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 subje
15、ct of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9682-2 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. This first edition of ISO 9682-2 cancels and replaces ISO 3886:1986
16、, which has been technically revised. It has been updated to alter the manner in which precision data are presented. ISO 9682 consists of the following parts, under the general title Iron ores Determination of manganese content: Part 1: Flame atomic absorption spectrometric method Part 2: Periodate
17、spectrophotometric method INTERNATIONAL STANDARD ISO 9682-2:2006(E) ISO 2006 All rights reserved 1 Iron ores Determination of manganese content Part 2: Periodate spectrophotometric method WARNING This part of ISO 9682 may involve hazardous materials, operations and equipment. This part of ISO 9682 d
18、oes not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this part of ISO 9682 to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use. 1 Scope This part of ISO 9682 spec
19、ifies a spectrophotometric method using sodium periodate for the determination of the mass fraction of manganese in iron ores. This method is applicable to a mass-fraction range of 0,02 % to 8 % of manganese in natural iron ores, and iron ore concentrates and agglomerates, including sinter products.
20、 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 648, Laboratory glass
21、ware One-mark pipettes ISO 1042, Laboratory glassware One-mark volumetric flasks ISO 3082, Iron ores Sampling and sample preparation procedures ISO 3696, Water for analytical laboratory use Specification and test methods ISO 7764, Iron ores Preparation of predried test samples for chemical analysis
22、3 Principle A test portion is decomposed by one of the following methods: a) treatment with hydrochloric, nitric and perchloric acids; b) sintering with sodium peroxide, followed by treatment with hydrochloric and perchloric acids. The mixture is filtered and the residue is ignited, followed by trea
23、tment with hydrofluoric and sulfuric acids, and fusion with sodium carbonate. The cooled melt is dissolved in the main solution. Managanese in an aliquot is oxidized to permanganate ion, using sodium periodate in sulfuric acid/phosphoric acid medium. ISO 9682-2:2006(E) 2 ISO 2006 All rights reserved
24、The absorbance due to the permanganate ion is measured spectrophotometrically at a wavelength of about 535 nm. 4 Reagents During the analysis, use only reagents of recognized analytical grade, and only water that conforms to grade 2 of ISO 3696 except that water which is free from organic matter (4.
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