SIST EN ISO 11490:1998
(Main)Determination of palladium in palladium jewellery alloys - Gravimetric method with dimethyl glyoxime (ISO 11490:1995)
Determination of palladium in palladium jewellery alloys - Gravimetric method with dimethyl glyoxime (ISO 11490:1995)
Specifies a gravimetric method for the determination of palladium in palladium jewellery alloys, preferably within the range of fineness stated in ISO 9202. These alloys may contain silver, indium, gallium, copper, cobalt, nickel, tin and ruthenium. Coprecipitated elements have to be determined by a suitable method and a correction applied.
Bestimmung von Palladium in Palladium-Schmucklegierungen - Gravimetrische Bestimmung mit Dimethylglyoxim (ISO 11490:1995)
Dosage du palladium dans les alliages de palladium pour la bijouterie-joaillerie - Méthode gravimétrique a la diméthylglyoxime (ISO 11490:1995)
La présente Norme internationale prescrit une méthode gravimétrique de dosage du palladium dans les alliages de palladium utilisés en bijouterie-joaillerie, de titres compris, de préférence, dans les limites indiquées dans l'ISO 9202. Ces alliages peuvent contenir de l'argent, de l'indium, du gallium, du cuivre, du cobalt, du nickel, de l'étain et du ruthénium. Les éléments coprécipités doivent être dosés au moyen d'une méthode adéquate et une correction doit être appliquée.
Določevanje paladija v zlitinah za nakit iz paladija - Gravimetrična metoda z dimetil glioksimom (ISO 11490:1995)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11490:1998
01-april-1998
'RORþHYDQMHSDODGLMDY]OLWLQDK]DQDNLWL]SDODGLMD*UDYLPHWULþQDPHWRGD]GLPHWLO
JOLRNVLPRP ,62
Determination of palladium in palladium jewellery alloys - Gravimetric method with
dimethyl glyoxime (ISO 11490:1995)
Bestimmung von Palladium in Palladium-Schmucklegierungen - Gravimetrische
Bestimmung mit Dimethylglyoxim (ISO 11490:1995)
Dosage du palladium dans les alliages de palladium pour la bijouterie-joaillerie -
Méthode gravimétrique a la diméthylglyoxime (ISO 11490:1995)
Ta slovenski standard je istoveten z: EN ISO 11490:1995
ICS:
39.060 Nakit Jewellery
SIST EN ISO 11490:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11490:1998
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SIST EN ISO 11490:1998
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SIST EN ISO 11490:1998
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SIST EN ISO 11490:1998
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SIST EN ISO 11490:1998
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SIST EN ISO 11490:1998
INTERNATIONAL ISO
STANDARD
11490
First edition
1995-05-01
Determination of palladium in palladium
jewellery alloys - Gravimetric
determination with dimethylglyoxime
Dosage du palladium dans /es alliages de palladium pour Ia
- Dosage gravm&rique par Ia dim&hylglyoxime
boouterie-joaillerie
Reference number
ISO 11490:1995(E)
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SIST EN ISO 11490:1998
ISO 11490:1995(E)
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
technicai committees. Esch member body interested in a subject for
which a technicai committee has been estabiished has the right to be
represented on that committee. international organizations, governmentai
and non-governmental, in iiaison with ISO, also take part in the work. ISO
coilaborates ciosely with the international Eiectrotechnical Commission
(IEC) on all matters of eiectrotechnical standardization.
Draft international Standards adopted by the technical committees are
circulated to the member bodies for voting. Pubiication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 11490 was prepared by Technicai Committee
iSO/TC 174, Jewellery.
Annex A of this International Standard is for information oniy.
0 ISO 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopyrng and
microfilm, without Permission in writing from the publisher.
International Org anization for Standardization
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii
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SIST EN ISO 11490:1998
INTERNATIONAL STANDARD 0 ISO ISO 11490:1995(E)
Determination of palladium in palladium jewellery
Gravimetric determination with
alloys -
dimethylglyoxime
1 Scope 4 Reagents
During the analysis, unless otherwise stated, use only
This International Standard specifies a gravimetric
reagents of recognized analytical grade and only dis-
method for the determination of Palladium in
tilled water or water of equivalent purity.
Palladium jewellery alloys, preferabiy within the range
of fineness stated in ISO 9202.
4.1 Nitrit acid, 69 % (m/m), p20 = 1,41 g/cm3.
These alloys which may contain silver, indium,
gallium, topper, Cobalt, nickel, tin and ruthenium.
4.2 Hydrochlorit acid,
Coprecipitated elements have to be determined by a
38 % (ndm), p20 = 1,19 g/cm3.
suitable method and a correction applied.
4.3 Dilute hydrochloric acid,
8,5 % (rdm), p20 = 1,04 g/cm3.
2 Normative reference
4.4 Dimethylglyoxime Solution.
The following Standard contains provisions which,
through reference in this text, constitute provisions
Dissolve 10 g of dimethylglyoxime in 1 litre of ethanol.
of this International Standard. At the time of publi-
cation, the edition indicated was valid. All Standards
4.5 Ammonium chloride.
are subject to revision, and Parties to agreements
based on this International Standard are encouraged
to investigate the possibility of applying the most re-
4.6 Dilute nitric acid,
cent edition of the Standard indicated below. Mem-
1,39 % (di72), p20 = 1,OO g/cm3.
bers of IEC and ISO maintain registers of currently
vaiid International Standards. Cautiousiy add 10 ml of nitric acid (4.1) to 1 000 ml
of water and mix.
ISO 9202:1991, Jewellery - Fheness of precious
metal alloys.
4.7 Hydrofluoric acid,
40 % (m/m), p20 = 1 ,13 g/cm3.
4.8 Dilute sulfuric acid,
3 Principle
49 % (m/m), p20 = 1,4 g/cm3.
The Sample is dissoived in aqua regia. Palladium is
Cautiously add 100 ml of sulfuric acid [98 % (m/m),
precipitated with dimethylglyoxime. lf present, siiver
p20 = %,86 g/cm3] to 100 mi of water and mix.
is separated as siiver chloride. The Palladium
dimethylgiyoxime compound is converted to metallic
Palladium by ignition and the latter is then determined 4.9 Reducing gas, such as hydrogen or a
gravimetrically. hydrogenlnitrogen mixture.
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SIST EN ISO 11490:1998
0 ISO
ISO 11490:1995(E)
pressure, carbon dioxide or
4.10 Inert gas under 7.3 Remove the watch glass and gently evaporate
nitrogen are usual. to dryness. Dissolve the residue in 10 mi of
hydrochloric acid (4.2) and dilute to about 100 mi.
4.11 Aqua regia.
7.4 If a precipitate forms, allow it to settle for 12 h
Mix 3 volumes of hydrochloric acid (4.2) and 1 volume
in a dark place. Filter and wash with dilute nitric acid
of nitric acid (4.1).
(4.6), retaining the precipitate for the determination
of traces of Palla
...
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