EN ISO 11489:1995

Determination of platinum in platinum jewellery alloys - Gravimetric method after reduction with mercury(I) chloride (ISO 11489:1995)

Specifies a gravimetric method for the determination of platinum in platinum jewellery alloys, preferably within the range of fineness stated in ISO 9202. The procedure applies specifically to platinum alloys incorporating palladium, iridium, rhodium, copper, cobalt, gold, ruthenium, gallium, chromium, indium and less than 5 % tungsten. Some modifications are indicated where palladium, iridium, rhodium, gold or ruthenium are present.

Bestimmung von Platin in Platin-Schmucklegierungen - Gravimetrische Bestimmung durch Reduktion mit Quecksilber(I)-chlorid (ISO 11489:1995)

Dosage du platine dans les alliages de platine pour la bijouterie-joaillerie - Méthode gravimétrique après réduction au chlorure de mercure(I) (ISO 11489:1995)

La présente Norme internationale prescrit une méthode gravimétrique de dosage du platine dans les alliages de platine utilisés en bijouterie-joaillerie, de titres compris, de préférence, dans les limites indiquées dans l'ISO 9202. Le mode opératoire s'applique de manière spécifique aux alliages de platine contenant du palladium, de l'iridium, de l'or, du rhodium, du cuivre, du cobalt, du ruthénium, du gallium, du chrome, de l'indium et moins de 5 % de tungstène. Des modifications sont indiquées en cas de présence de palladium, d'or, de ruthénium, d'iridium ou de rhodium.

Določevanje platine v zlitinah za nakit iz platine - Gravimetrična metoda po redukciji z živosrebrovim(I) kloridom (ISO 11489:1995)

General Information

• Status: Withdrawn
• Publication Date: 30-Apr-1995
• Withdrawal Date: 07-Nov-2017
• ICS: 39.060 - Jewellery
• Technical Committee: CEN/TC 283 - Precious metalls - Applications in jewellery and associated products
• Drafting Committee: CEN/TC 283/WG 1 - Sampling and analysis
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 08-Nov-2017
• Ref Project: SIST EN ISO 11489:1998 - Determination of platinum in platinum jewellery alloys - Gravimetric method after reduction with mercury(I) chloride (ISO 11489:1995)

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-1998
'RORþHYDQMHSODWLQHY]OLWLQDK]DQDNLWL]SODWLQH*UDYLPHWULþQDPHWRGDSR
UHGXNFLML]åLYRVUHEURYLP,NORULGRP,62
Determination of platinum in platinum jewellery alloys - Gravimetric method after
reduction with mercury(I) chloride (ISO 11489:1995)
Bestimmung von Platin in Platin-Schmucklegierungen - Gravimetrische Bestimmung
durch Reduktion mit Quecksilber(I)-chlorid (ISO 11489:1995)
Dosage du platine dans les alliages de platine pour la bijouterie-joaillerie - Méthode
gravimétrique apres réduction au chlorure de mercure(I) (ISO 11489:1995)
Ta slovenski standard je istoveten z: EN ISO 11489:1995
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
ISO
STANDARD 11489
First edition
1995-05-01
Determination of platinum in platinum
jewellery alloys - Gravimetric
determination by reduction with mercury( 1)
chloride
Dosage du Platine dans /es alliages de Platine pour Ia
bijouterie-joaillerie - Dosage gravimetrique par reduction au chlorure de
mercurefl)
ISO 11489:1995(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
technical committees. Esch 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 International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard ISO 11489 was prepared by Technical Committee
lSO/TC 174, Jewellery.
Annex A of this International Standard is for information only.
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, electronrc or mechanical, inciuding photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
ISO 11489:1995(E)
INTERNATIONAL STANDARD 0 ISO
Determination of platinum in platinum jewellery
alloys - Gravimetric determination by reduction with
mercury(l) chloride
and Palladium will also be precipitated by this re-
1 Scope
duction procedure. Their content shall be determined
separately by, for example, atomic absorption or in-
This International Standard specifies a gravimetric
ductively coupled Plasma (ICP) emission spectro-
method for the determination of platinum in platinum
metry, and a correction applied.
jewellery alloys, preferably within the range of
fineness stated in ISO 9202.
4 Reagents
The procedure applies specifically to platinum alloys
incorporating Palladium, iridium, rhodium, topper,
During the analysis, unless otherwise stated, use only
Cobalt, gold, ruthenium, gallium, chromium, indium
reagents of recognized analytical grade and only dis-
and less than 5 % tungsten. Some modifications are
tilled water or water of equivalent purity.
indicated where Palladium, iridium, rhodium, gold or
ruthenium are present.
4.1 Hydrochlorit acid, 36 % (m/m) to 38 % (m/m),
m
p20 = IJ 9 g/cm ”.
2 Normative reference
4.2 Dilute hydrochloric acid, 18 % (m/m),
The following Standard contains provisions which,
cm3.
p2() = ID g
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
4.3 Dilute hydrochloric acid, 8,5 % (dm),
cation, the edition indicated was valid. All Standards
cm .
p20 = 1104 g
are subject to revision, and Parties to agreements
based on this International Standard are encouraged
r)
to investigate the possibility of applying the most re- 4.4 Nitrit acid, 69 % bwbz), p20 = 1,41 g/cm ”.
cent edition of the Standard indicated below. Mem-
bers of IEC and ISO maintain registers of currently
4.5 Mercury(l) chloride (Hg,CI,), in Suspension.
valid International Standards.
Dissolve 200 g of mercury(I) nitrate dihydrate
ISO 9202:1991, Jewellery - Fineness of precious
[Hg,(NO,),.2H,O] in 300 ml of water in a beaker and
metal alloys.
add approximately 50 ml of nitric acid; just sufficient
to ensure that the basic mercury(l) nitrate is redis-
solved. Dilute the Solution with water to 4 litres and
3 Principle
add 400 ml of cold saturated ammonium chloride sol-
ution. Allow the precipitate of mercury(l) chloride to
The Sample is dissolved in aqua regia. After elim-
settle, decant and wash about 20 times to ensure that
ination of all nitrates by evaporation, the residue is
it is nitrate free. Add 2 litres of water and store in a
dissolved in hydrochloric acid. The platinum is then
closed f las k.
precipitated from this Solution by reduction with
mercury(l) chloride. The mercury is eliminated by ig-
NOTE 1
This Suspension is stable and tan be used even
nition and the platinum is weighed. If present, gold after storage for a few months.

0 ISO
ISO 11489:1995(E)
4.6 Hydrofluoric acid, beaker covered with a watch glass, while heating
1,13 g/cm3. gently.
40 % (l7dm), p20 =
Any insoluble material remaining after this pr
...