1、March 2017 English price group 16No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.080.01!%bo,“2637609www.din.deDI
2、N EN ISO 15512Plastics Determination of water content (ISO 15512:2016);English version EN ISO 15512:2016,English translation of DIN EN ISO 15512:2017-03Kunststoffe Bestimmung des Wassergehaltes (ISO 15512:2016);Englische Fassung EN ISO 15512:2016,Englische bersetzung von DIN EN ISO 15512:2017-03Plas
3、tiques Dosage de leau (ISO 15512:2016);Version anglaise EN ISO 15512:2016,Traduction anglaise de DIN EN ISO 15512:2017-03SupersedesDIN EN ISO 15512:201412www.beuth.deDocument comprises 35 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered autho
4、ritative.02.17 DIN EN ISO 15512:2017-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 15512:2016) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsi
5、ble German body involved in its preparation was DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-01-03 AA Physikalische, rheologische und analytische Prfungen. The DIN Standards corresponding to the International Standards referred to in this document are
6、as follows: ISO 62 DIN EN ISO 62 ISO 307 DIN EN ISO 307 ISO 1628-1 DIN EN ISO 1628-1 ISO 1628-2 DIN EN ISO 1628-2 ISO 1628-3 DIN EN ISO 1628-3 ISO 1628-5 DIN EN ISO 1628-5 Amendments This standard differs from DIN EN ISO 15512:2014-12 as follows: a) the standard has been editorially revised; b) in 6
7、.2.1, the theoretical water content of sodium molybdate dihydrate has been corrected to 14,9 % (mass). Previous editions DIN EN ISO 960: 1998-03 DIN EN ISO 15512: 2004-05, 2009-10, 2014-12 DIN EN ISO 15512:2017-03 3 National Annex NA (informative) Bibliography DIN EN ISO 62, Plastics Determination o
8、f water absorption DIN EN ISO 307, Plastics Polyamides Determination of viscosity number DIN EN ISO 1628-1, Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometer Part 1: General characteristics DIN EN ISO 1628-2, Plastics Determination of the viscosity of
9、polymers in dilute solution using capillary viscosimeters Part 2: Poly(vinyl chloride) resins DIN EN ISO 1628-3, Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 3: Polyethylenes and polypropylenes DIN EN ISO 1628-5, Plastics Determination of th
10、e viscosity of polymers in dilute solution using capillary viscometers Part 5: Thermoplastic polyester (TP) homopolymers and copolymers DIN EN ISO 15512:2017-03 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15512 November 2016 ICS 83.080.01 Supersedes EN
11、 ISO 15512:2014English Version Plastics - Determination of water content(ISO 15512:2016) Plastiques - Dosage de leau (ISO 15512:2016) Kunststoffe - Bestimmung des Wassergehaltes(ISO 15512:2016) This European Standard was approved by CEN on 29 September 2016. CEN members are bound to comply with the
12、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-CENELEC Management
13、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-CENELEC Management Centre has the same status as
14、 the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Net
15、herlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All ri
16、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15512:2016 EEuropean foreword .4Introduction 61 Scope . 72 Normative references 73 Method A Extraction with anhydrous methanol 73.1 Principle 73.2 Reagents 83.3 Apparatus 83.4 Preparation o
17、f test sample 83.4.1 Granules or powder . 83.4.2 Finished articles . 83.5 Procedure 93.5.1 Precautions . 93.5.2 Preparation of test portions . 93.5.3 Determination 93.6 Expression of results 93.7 Precision 104 Method B1 Water vaporization using a heating tube oven 104.1 Principle . 104.2 Reagents. 1
18、04.3 Apparatus . 114.4 Preparation of test sample . 124.5 Procedure . 124.5.1 Precautions 124.5.2 Preparation of apparatus . 124.5.3 Equipment check 124.5.4 Determination . 144.6 Expression of results . 144.7 Precision 155 Method B2 Water vaporization using a heated sample vial 155.1 Principle . 155
19、.2 Reagents. 155.3 Apparatus . 165.4 Preparation of test sample . 175.5 Procedure . 185.5.1 Preparation of apparatus . 185.5.2 Equipment check 185.5.3 Determination .185.6 Expression of results . 205.7 Precision 206 Method C Manometric method 216.1 Principle . 216.2 Reagents. 216.3 Apparatus . 216.4
20、 Preparation of test sample . 226.5 Procedure . 226.5.1 Equipment 226.5.2 Outgassing 236.5.3 Calibration 236.5.4 Determination .246.6 Expression of results . 266.7 Precision 26Contents PageDIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E)2Foreword 57 Test report 26Annex A (informative) Alternative samp
21、le preparation methods and titration methods .27Annex B (informative) Selection of the optimum heating temperature for the water content determination 28Annex C (normative) Determination of the water content of a water standard 30Bibliography .31DIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E) 3 Europ
22、ean foreword This document (EN ISO 15512:2016) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with 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 pub
23、lication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017. 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
24、not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 15512:2014. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulga
25、ria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tur
26、key and the United Kingdom. Endorsement notice The text of ISO 15512:2016 has been approved by CEN as EN ISO 15512:2016 without any modification. DIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E)4 ForewordISO (the International Organization for Standardization) is a worldwide federation of national sta
27、ndards 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 or
28、ganizations, 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.The procedures used to develop this document and those intended for it
29、s further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/di
30、rectives).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. Details of any patent rights identified during the development of the document will be in t
31、he Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions relat
32、ed to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword Supplementary informationThe committee responsible for this document is ISO/TC 61, Plastics, Subcommittee
33、 SC 5, Physical-chemical properties.This fourth edition cancels and replaces the third edition (ISO 15512:2014), of which it constitutes a minor revision to update information in 6.2.1. DIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E) 5 IntroductionThe interlaboratory comparability of the water conten
34、t determination of plastics is often low. Major causes for this are the sample packaging, sample handling, and differences between equipment and settings. Samples have to, e.g. be packed in special glass containers or water barrier sealed bags. Sample handling is preferably to be carried out in a dr
35、y nitrogen or air environment. For improving the repeatability and reproducibility, the procedure prescribed in this International Standard is intended to be followed strictly.The temperature settings for the vaporization method are not specified in this International Standard. For the manometric me
36、thod, 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 has to be optimized concerning the material to be tested, the equipment in use, and the practi
37、cal 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 i
38、ncluded for optimization of the heating temperature in order to choose the correct temperature for the water content determination and to improve the interlaboratory comparability.DIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E)6 1 Scope1.1 This International Standard specifies methods for the determi
39、nation of the water content of plastics in the form of powder, granules, and finished articles. These methods do not test for water absorption (kinetics and equilibrium) of plastics as measured by ISO 62.Method A is suitable for the determination of water content as low as 0,1 % with an accuracy of
40、0,1 %. Method B and Method C are suitable for the determination of water content as low as 0,01 % with an accuracy of 0,01 %.Water content is an important parameter for processing materials and has to remain below the level specified in the appropriate material standard.1.2 Four alternative methods
41、are specified in this International Standard. 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 smaller than 4 mm 4 mm 3 mm. The method can also be used for, e.g. prepol
42、ymer materials in the form of a powder that are insoluble in methanol. Method B1 is a vaporization method using a tube oven. The water contained in the test portion is vaporized and carried to the titration cell by a dry air or nitrogen carrier gas, followed by a Karl Fischer titration of the collec
43、ted water. It can be used for all plastics and is applicable to granules smaller than 4 mm 4 mm 3 mm. Method B2 is a vaporization method using a heated sample vial. The water contained in the test portion is vaporized and carried to the titration cell by a dry air or nitrogen carrier gas, followed b
44、y a Karl Fischer titration of the collected water. It can be used for all plastics and is applicable to granules smaller than 4 mm 4 mm 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. Thi
45、s 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 are to be carried out periodically, for example by gas chrom
46、atography. Such checks are particularly required for new types or grades of material.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For un
47、dated references, the latest edition of the referenced document (including any amendments) applies.ISO 760, Determination of water Karl Fischer method (General method)3 Method A Extraction with anhydrous methanol3.1 PrincipleA test portion is extracted with anhydrous methanol and the extracted water
48、 determined by titration using the Karl Fischer method.DIN EN ISO 15512:2017-03 EN ISO 15512:2016 (E) 7 3.2 ReagentsDuring the analysis, use only reagents of recognized analytical grade.3.2.1 Titration medium, methanol anhydrous, having a water content less than 0,1 % by mass. Other solvents can be used if shown to be comparable.3.2.2 Karl Fisch
