ISO-15093-2008.pdf
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1、 Reference number ISO 15093:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 15093 First edition 2008-08-15 Jewellery Determination of precious metals in 999 gold, platinum and palladium jewellery alloys Difference method using inductively coupled plasma optical emission spectroscopy (ICP-OES) Joaillerie
2、, bijouterie Dosage des mtaux prcieux dans les alliages dor, de platine et de palladium 999 pour la joaillerie, bijouterie Mthode de la diffrence utilisant la spectromtrie dmission plasma induit par haute frquence (ICP-OES) Copyright International Organization for Standardization Provided by IHS und
3、er license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:33:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15093:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be
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6、e 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. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reprod
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8、9 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:33:42 MDTNo repro
9、duction or networking permitted without license from IHS -,-,- ISO 15093:2008(E) ISO 2008 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standard
10、s 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
11、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 t
12、o 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
13、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 15093 was prepared by Technical Committee ISO/TC 174, Jewellery. Copyright International Organization for Standardization Provided by I
14、HS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/2008 04:33:42 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for
15、Resale, 10/25/2008 04:33:42 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 15093:2008(E) ISO 2008 All rights reserved 1 Jewellery Determination of precious metals in 999 gold, platinum and palladium jewellery alloys Difference method using induct
16、ively coupled plasma optical emission spectroscopy (ICP-OES) 1 Scope This International Standard specifies an analytical procedure for the determination of either platinum in platinum jewellery alloys, gold in gold jewellery alloys or palladium in palladium jewellery alloys, with a nominal content o
17、f each precious metal of 999 (parts per thousand), by measuring specific elements listed in Tables A.1, A.2 and A.3. 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 ref
18、erences, the latest edition of the referenced document (including any amendments) applies. ISO 11596, Jewellery Sampling of precious metal alloys for and in jewellery and associated products 3 Principle The samples of the precious metal alloy are weighed and dissolved in aqua regia to prepare a 10 g
19、/l solution. The impurities are determined by inductively coupled plasma optical emission spectroscopy (ICP-OES), and the precious metal content is obtained by subtraction of the total content of impurities in the sample from 1 000 . 4 Sampling The sampling procedure shall be performed in accordance
20、 with ISO 11596. NOTE Equivalent methods can be used, as described in ISO 5725-1. For coated articles, appropriate precautions that have been agreed upon shall be taken to exclude the coating from the determination. 5 Reagents During the analysis, unless otherwise stated, use only reagents of recogn
21、ized analytical grade and only distilled water or water of equivalent purity. 5.1 Hydrochloric acid (HCl); 20 = 1,19 g/cm3; 37 % HCl (mass fraction). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 10/25/20
22、08 04:33:42 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 15093:2008(E) 2 ISO 2008 All rights reserved 5.2 Nitric acid (HNO3); 20 = 1,40 g/cm3; 67 % HNO3 (mass fraction). 5.3 Aqua regia (to be prepared just before use). To one part by volume of HNO3 (5.2), add three p
23、arts by volume of HCl (5.1) and mix thoroughly. 5.4 Mixed stock solutions Using appropriate certified reagents, the following mixed stock solutions shall be prepared in order to obtain the indicated concentrations. 5.4.1 Nitric stock solution (chloride free): Ag, Bi, Pb (100 mg/l each) in 2 mol/l of
24、 HNO3 (5.2). 5.4.2 Hydrochloric stock solution (nitrate free): Sn, Ti (100 mg/l each) in 2 mol/l of HCl (5.1). 5.4.3 Acid stock solution (may contain both chlorides and nitrates): all remaining relevant elements (100 mg/l each) in 1 mol/l of HCl (5.1) and 1 mol/l of HNO3 (5.2). Any desired element m
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