EN ISO 15512:2009
(Main)Plastics - Determination of water content (ISO 15512:2008)
Plastics - Determination of water content (ISO 15512:2008)
ISO 15512:2008 specifies methods for the determination of the water content of plastics in the form of granules and finished articles. These methods do not test for water absorption (kinetics and equilibrium) of plastics as measured by ISO 62. The methods are suitable for the determination of water content as low as the following levels:
Method A 0,1 % or better;
Method B 0,01 % or better;
Method C 0,01 % or better.
Three alternative methods are specified:
Method A is an extraction method using anhydrous methanol followed by a Karl Fischer titration of the extracted water. It can be used for all plastics and is applicable to granules having a maximum size of 4 mm x 4 mm x 3 mm.
Method B is a vaporization method using heated, dry air or nitrogen gas to evaporate the water, followed by a Karl Fischer titration of the collected water. It can be used for all plastics and is applicable to granules smaller than 4 mm x 4 mm x 3 mm.
Method C is a manometric method. The water content is determined from the increase in pressure which results when the water is evaporated under a vacuum. This method is not applicable to plastic samples containing volatile compounds, other than water, in amounts contributing significantly to the vapour pressure at room temperature. Checks for the presence of large amounts of volatile compounds should be carried out periodically, for example by gas chromatography. Such checks are particularly required for new types or grades of material.
Kunststoffe - Bestimmung des Wassergehaltes (ISO 15512:2008)
1.1 Diese Internationale Norm legt Verfahren zur Bestimmung des Wassergehaltes von Kunststoffen fest, die als Granulat oder Fertigartikel vorliegen. Bei diesen Verfahren wird nicht die Wasseraufnahme (Kinetik und Gleichgewicht) von Kunststoffen geprüft, wie diese in ISO 62 gemessen wird. Diese Verfahren sind zur Bestimmung von Wassergehalten bis hinunter zu folgenden Werten vorgesehen:
Verfahren A 0,1 % oder besser;
Verfahren B 0,01 % oder besser;
Verfahren C 0,01 % oder besser.
Der Wassergehalt ist ein wichtiger Parameter bei der Verarbeitung von Werkstoffen und sollte stets unter dem in den entsprechenden Werkstoffnormen festgelegten Wert bleiben.
1.2 In dieser Internationalen Norm sind drei alternative Verfahren festgelegt:
a) Verfahren A ist ein Extraktionsverfahren mit wasserfreiem Methanol und anschließender Titration des Wassers nach dem Karl Fischer Verfahren. Es kann für alle Kunststoffe verwendet werden und ist auf Granulat mit der maximalen Korngröße von 4 mm 4 mm 3 mm anwendbar.
b) Verfahren B ist ein Verdampfungsverfahren, bei dem mit aufgeheizter trockener Luft oder Stickstoffgas Wasser verdampft wird, und anschließend die Titration des gesammelten Wassers nach dem Karl Fischer Verfahren erfolgt. Es kann für sämtliche Kunststoffe angewendet werden und ist auf Granulat kleiner als 4 mm 4 mm 3 mm anwendbar.
c) Verfahren C ist ein manometrisches Verfahren. Der Wassergehalt wird aus dem Druckanstieg nach dem Verdampfen des Wassers unter Vakuum bestimmt. Das Verfahren kann nicht auf Kunststoffproben angewendet werden, die andere flüchtige Bestandteile als Wasser in solchen Mengen enthalten, dass diese signifikant zum Dampfdruck bei Raumtemperatur beisteuern. In regelmäßigen Abständen sollte, z. B. durch Gaschromatographie, die Anwesenheit großer Mengen an flüchtigen Bestandteilen überprüft werden. Diese Überprüfungen sind insbesondere notwendig bei neuen Typen oder Klassen von Werk¬stoffen.
Plastiques - Dosage de l'eau (ISO 15512:2008)
L'ISO 15512:2008 spécifie des méthodes pour le dosage de l'eau dans les plastiques sous forme de granulés et d'articles finis. Ces méthodes ne contrôlent pas l'absorption d'eau (cinétique et équilibre) des plastiques, cet aspect étant traité dans l'ISO 62. Les méthodes sont applicables au dosage de l'eau à des niveaux aussi faibles que les suivants:
Méthode A 0,1 % ou mieux;
Méthode B 0,01 % ou mieux;
Méthode C 0,01 % ou mieux.
La teneur en eau est un paramètre important de la mise en œuvre des matériaux et il convient qu'elle reste en dessous du niveau spécifié dans la norme de produit appropriée.
Trois méthodes possibles sont spécifiées:
La méthode A consiste en une extraction de l'eau à l'aide de méthanol anhydre suivie d'un titrage de l'eau extraite par la méthode de Karl Fischer. Elle est applicable aux granulés de dimensions maximales 4 mm x 4 mm x 3 mm et peut être utilisée pour tous les plastiques.
La méthode B procède par vaporisation de l'eau à l'aide d'air sec ou d'azote gazeux chauffé suivie d'un titrage de l'eau recueillie par la méthode de Karl Fischer. Elle est applicable aux granulés de moins de 4 mm x 4 mm x 3 mm et peut être utilisée pour tous les plastiques.
La méthode C est une méthode manométrique. Le dosage se fonde sur l'augmentation de pression après évaporation de l'eau sous vide. Cette méthode n'est pas applicable aux échantillons de plastiques contenant des composés volatils, autres que l'eau, en quantité suffisante pour avoir un effet significatif sur la pression de vapeur à température ambiante. Il convient d'effectuer périodiquement des vérifications de la présence de grandes quantités de composés volatils, par exemple par chromatographie en phase gazeuse. Ces vérifications sont particulièrement nécessaires pour les nouveaux types ou les nouvelles qualités de matériaux.
Polimerni materiali - Določevanje vode (ISO 15512:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2009
1DGRPHãþD
SIST EN ISO 15512:2004
3ROLPHUQLPDWHULDOL'RORþHYDQMHYRGH ,62
Plastics - Determination of water content (ISO 15512:2008)
Kunststoffe - Bestimmung des Wassergehaltes (ISO 15512:2008)
Plastiques - Dosage de l'eau (ISO 15512:2008)
Ta slovenski standard je istoveten z: EN ISO 15512:2009
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 15512
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2009
ICS 83.080.01 Supersedes EN ISO 15512:2003
English Version
Plastics - Determination of water content (ISO 15512:2008)
Plastiques - Dosage de l'eau (ISO 15512:2008) Kunststoffe - Bestimmung des Wassergehaltes (ISO
15512:2008)
This European Standard was approved by CEN on 20 June 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15512:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
The text of ISO 15512:2008 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 15512:2009 by
Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2010, and conflicting national standards shall be withdrawn at
the latest by January 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 15512:2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 15512:2008 has been approved by CEN as EN ISO 15512:2009 without any modification.
INTERNATIONAL ISO
STANDARD 15512
Second edition
2008-05-15
Plastics — Determination of water
content
Plastiques — Dosage de l'eau
Reference number
ISO 15512:2008(E)
©
ISO 2008
ISO 15512:2008(E)
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ii © ISO 2008 – All rights reserved
ISO 15512:2008(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Method A — Extraction with anhydrous methanol . 2
3.1 Principle. 2
3.2 Reagents. 2
3.3 Apparatus . 2
3.4 Preparation of test sample. 2
3.5 Procedure . 3
3.6 Expression of results . 3
3.7 Precision. 4
4 Method B — Water vaporization. 4
4.1 Principle. 4
4.2 Reagents. 4
4.3 Apparatus . 5
4.4 Preparation of sample . 6
4.5 Procedure . 6
4.6 Expression of results . 8
4.7 Precision. 8
5 Method C — Manometric method. 8
5.1 Principle. 8
5.2 Reagent. 8
5.3 Apparatus . 9
5.4 Preparation of sample . 9
5.5 Procedure . 11
5.6 Expression of results . 13
5.7 Precision. 13
6 Test report . 13
Annex A (informative) Selection of the optimum heating temperature for the water content
determination . 14
Bibliography . 16
ISO 15512:2008(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. 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
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 to 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 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 15512 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This second edition cancels and replaces the first edition (ISO 15512:1999), which has been technically
revised.
iv © ISO 2008 – All rights reserved
ISO 15512:2008(E)
Introduction
The inter-laboratory comparability of water content determinations is often low. Major causes for this are the
sample packaging, sample handling and differences between equipment and settings. In order to be able to
compare data between two laboratories, special care needs to be taken with sample packaging and sample
handling. Samples should e.g. be packed in special glass containers or water barrier sealed bags. Sample
handling should preferably be carried out in a dry nitrogen or air environment. To improve the repeatability and
reproducibility, the procedure specified in this International Standard should be followed strictly.
The temperature settings for the vaporization method described in this International Standard are not specified
in the standard. For the manometric method, a temperature of 200 °C is often used. However, for some
condensation materials this might be too high and could e.g. cause generation of water due to a condensation
reaction.
The heating temperature should be optimized concerning the material to be tested, the equipment in use and
the practical circumstances. If the temperature is too low, the total amount of water in the material to be tested
will not be evaporated completely, whereas too high temperatures cause water generation due to effects like
degradation and condensation reactions.
In this International Standard, a procedure is included for optimization of the heating temperature in order to
choose the correct temperature for the water content determination and to improve the inter-laboratory
comparability.
INTERNATIONAL STANDARD ISO 15512:2008(E)
Plastics — Determination of water content
1 Scope
1.1 This International Standard specifies methods for the determination of the water content of plastics
...
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