EN ISO 1597:1999

Plastics - Unplasticized cellulose acetate - Determination of acetic acid yield (ISO 1597:1994)

CEN/TC 249 Resolution 118 dated 2001-09-20 requests to withdraw this standard

Kunststoffe - Weichmacherfreies Celluloseacetat - Bestimmung des Essigsäuregehaltes (ISO 1597:1994)

Diese Internationale Norm legt zwei Verfahren zur Bestimmung des Essigsäuregehaltes von weichmacherfreiem Celluloseacetat fest. Diese Verfahren sind für die Untersuchung von Celluloseacetat ohne Weichmacher und frei von Zusatzstoffen, Füllstoffen, Farben und anderen Substanzen, die die Untersuchungen beeinträchtigen können, bestimmt. Falls derartige Substanzen vorliegen, müssen sie vorhernach einem zwischen den Vertragspartnern zu vereinbarenden Verfahren abgetrennt werden.

Plastiques - Acétate de cellulose non plastifié - Détermination du titre en acide acétique (ISO 1597:1994)

Polimerni materiali - Nemehčani acetat celuloze - Določevanje ocetne kisline (ISO 1597:1994)

General Information

• Status: Withdrawn
• Publication Date: 22-Jun-1999
• Withdrawal Date: 01-Jul-2004
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 02-Jul-2004
• Completion Date: 02-Jul-2004
• Ref Project: SIST EN ISO 1597:2000 - Plastics - Unplasticized cellulose acetate - Determination of acetic acid yield (ISO 1597:1994)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoffe - Weichmacherfreies Celluloseacetat - Bestimmung des Essigsäuregehaltes (ISO 1597:1994)Plastiques - Acétate de cellulose non plastifié - Détermination du titre en acide acétique (ISO 1597:1994)Plastics - Unplasticized cellulose acetate - Determination of acetic acid yield (ISO 1597:1994)83.080.20PlastomeriThermoplastic materialsICS:Ta slovenski standard je istoveten z:EN ISO 1597:1999SIST EN ISO 1597:2000en01-maj-2000SIST EN ISO 1597:2000SLOVENSKI
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SIST EN ISO 1597:2000



SIST EN ISO 1597:2000



SIST EN ISO 1597:2000



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SIST EN ISO 1597:2000



SIST EN ISO 1597:2000



SIST EN ISO 1597:2000



INTERNATIONAL STANDARD ISO 1597 Second edition 1994-1 O-l 5 Plastics - Unplasticized cellulose acetate - Determination of acetic acid yield Plas tiques - Ac&a te de cellulose non plas tifi6 - Dhermina tion du titre en acide abtique Reference number ISO 1597:1994(E) SIST EN ISO 1597:2000



ISO 1597:1994(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 technicai 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 1597 was prepared by Technical Committee lSO/TC 61, Plastics, Subcommittee SC 9, Thermop/astic materjak. This second edition cancels and replaces the first edition (ISO 1597:1975), of which it constitutes a minor revision. 0 ISO 1994 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, inciuding photocopyrng and microfilm, without Permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-121 1 Geneve 20 l Swi tzerland Printed in Switzerland ii SIST EN ISO 1597:2000



INTERNATIONAL STANDARD 0 60 ISO 1597:1994(E) Plastics - Unplasticized ce Determination of acetic acic ose acetate - eld WARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety Problems associated with its use. lt is the responsibility of the User of this Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations Prior to use. 1 Scope This International Standard specifies two methods for the determination of the acetic acid yield of unplasticized cellulose acetate. These methods are intended for cellulose acetate without plasticizers and free of additives, fillers, dyes or other materials which affect the tests. When such materials are present, they shall first be removed by a method agreed between the contracting Parties. The methods are applicable to cellulose acetate hav- ing any acetic acid yield. Method A is applicable to cellulose acetate in the form of finely divided powder. Method B is applicable to cellulose acetate in any physical form (powder, grains, flakes, etc.). 2 Normative references The following Standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All Standards are subject to revision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the Standards indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. ISO 565:1990, Test sieves - Metal wire cloth, per- forated metal plate and electroformed sheet - Nom- inal sizes of openings. ISO 585: 1990, Plastics - Unplas ticized cellulose acetate - Determination o f mois ture con ten t. 3 Definition For the purposes of this Internationa following definition applies. 3.1 acetic acid yield: The quantity o I Standard, the if acetic acid, in grams, in 100 g of dry cellulose acetate, as calculated from the amount of sodium hydroxide necessary for the complete hydrolysis of the cellulose acetate. 4 Principle 4.1 Method A A test Portion of finely divided cellulose acetate is left in contact with a mixture of acetone and aqueous sodium hydroxide Solution. The amount of alkali consumed in hydrolysing the cellulose acetate is then determined by titration. 4.2 Method B A test Portion of cellulose acetate is dissolved in dimethylsulfoxide, and aqueous sodium hydroxide Solution added. 1 SIST EN ISO 1597:2000



ISO 1597:1994(E) 0 ISO The amount of alkali consumed in hydrolysing the cellulose acetate is then determined by titration. When using method B, care must be taken to avoid direct contact of dimethylsulfoxide, which is toxic, with the human skin. 5 Method A 5.1 Reagents During the determination, use only reagents of re- cognized analytical grade and distilled water as speci- fied in 5.1.1. 51.1 Distilled water, freshly boiled to remove car- bon dioxide and cooled. 5.1.2 Acetone. SAFETY PRECAUTIONS - Acetone is highly flammable. Keep the Container in a well ventilated place and away from sources of ignition. DO not smoke. Take precautionary measures against static discharges. 5.1.3 Sulfuric acid, Solution, c(H2SOa) N 0,5 mol/l. 5.1.4 Sodium hydroxide, solution, c(NaOH) z 1 mol/l. 5.1.5 Sodium hydroxide, Standard volumetric sol- ution, c(NaOH) = 0,5 mol/l, carbonate-free. 5.1.6 Phenolphthalein Solution, IO g/l in etha
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