ISO-3750-2006.pdf
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1、 Reference number ISO 3750:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 3750 Second edition 2006-06-01 Zinc alloys Determination of magnesium content Flame atomic absorption spectrometric method Alliages de zinc Dosage du magnsium Mthode par spectromtrie dabsorption atomique dans la flamme Copyright
2、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 10:46:14 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3750:2006(E) PDF disclaimer This PDF file may contain
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5、ters 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. Unless otherwise
6、 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. ISO copyright off
7、ice 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=NASA Technical
8、Standards 1/9972545001 Not for Resale, 04/21/2007 10:46:14 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3750:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Principle. 2 5 Reagents
9、2 6 Apparatus 3 7 Sampling 3 8 Procedure 3 9 Calculation and expression of results 5 10 Test report . 6 Annex A (informative) Additional information on international cooperative tests 7 Annex B (informative) Graphical representation of precision data 8 Copyright International Organization for Standa
10、rdization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 10:46:14 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3750:2006(E) iv ISO 2006 All rights reserved Foreword ISO (the International Organization
11、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 t
12、he 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. Interna
13、tional 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. Publicatio
14、n 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
15、. ISO 3750 was prepared by Technical Committee ISO/TC 18, Zinc and zinc alloys, Subcommittee SC 1, Methods of sampling and analysis of zinc and zinc alloys. This second edition cancels and replaces the first edition (ISO 3750:1976), which has been technically revised. It is based on European standar
16、d EN 12441-2:2001, Zinc and zinc alloys Chemical analysis Part 2: Determination of magnesium in zinc alloys Flame atomic absorption spectrometric method. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not
17、 for Resale, 04/21/2007 10:46:14 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 3750:2006(E) ISO 2006 All rights reserved 1 Zinc alloys Determination of magnesium content Flame atomic absorption spectrometric method 1 Scope This International Sta
18、ndard specifies a flame atomic absorption spectrometric method for the determination of magnesium in zinc alloys. It is applicable to the products specified in ISO 301 and ISO 752. It is suitable for the determination of magnesium contents (mass fractions) between 0,002 % and 0,08 %. 2 Normative ref
19、erences 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 301, Zinc alloy ingots intended for c
20、asting ISO 752, Zinc ingots ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and rep
21、roducibility of a standard measurement method ISO 5725-3, Accuracy (trueness and precision) of measurement methods and results Part 3: Intermediate measures of the precision of a standard measurement method ISO 20081, Zinc and zinc alloys Method of sampling Specifications 3 Terms and definitions For
22、 the purposes of this document, the terms and definitions given in ISO 20081 and the following apply. 3.1 flame atomic absorption spectrometry measurement of the absorption of electromagnetic radiation, emitted by an element at a determined wavelength, by an absorbent medium (flame) formed of atoms
23、of the same element that are in the ground state NOTE Each element absorbs radiation of specific wavelengths and the intensity of the absorbed radiation is proportional to the concentration of the said element. Copyright International Organization for Standardization Provided by IHS under license wi
24、th ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 10:46:14 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3750:2006(E) 2 ISO 2006 All rights reserved 4 Principle A sample of the alloy is dissolved in a mixture of hydrochloric and nitric a
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