1、May 2016 English price group 9No 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 17.180.20; 87.060.20!%SMK“2484240www.
2、din.deDIN EN ISO 6271Clear liquids Estimation of colour by the platinum-cobalt colour scale (ISO 6271:2015);English version EN ISO 6271:2015,English translation of DIN EN ISO 6271:2016-05Klare Flssigkeiten Bestimmung der Farbe nach der Platin-Cobalt-Farbskala (ISO 6271:2015);Englische Fassung EN ISO
3、 6271:2015,Englische bersetzung von DIN EN ISO 6271:2016-05Liquides clairs valuation de la couleur au moyen de lchelle platine-cobalt (ISO 6271:2015);Version anglaise EN ISO 6271:2015,Traduction anglaise de DIN EN ISO 6271:2016-05SupersedesDIN EN ISO 6271-1:2005-03 andDIN EN ISO 6271-2:2005-03www.be
4、uth.deDocument comprises 14 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.16 DIN EN ISO 6271:2016-05 2 A comma is used as the decimal marker. National foreword This document (EN ISO 6271:2015) has been prepared by Technica
5、l Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Beschichtungs-stoffe und Beschichtungen (DIN Standards Committee Coati
6、ngs and Coating Materials), Working Committee NA 002-00-02 AA Lackrohstoffe. ISO 6271 was prepared in collaboration with ASTM D 01.34, Naval stores. It has been harmonized with ASTM D 1209-05, Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale). The DIN Standards corresponding to
7、 the International Standards referred to in this document are as follows: ISO 3696 DIN ISO 3696 ISO 5725-2 DIN ISO 5725-2 ISO 15528 DIN EN ISO 15528 Amendments This standard differs from DIN EN ISO 6271-1:2005-03 and DIN EN ISO 6271-2:2005-03 as follows: a) Parts 1 and 2 have been combined into one
8、standard; b) the spectrophotometric method (formerly described in DIN EN ISO 6271-2:2005-03) is now the only standardized method; c) the original visual comparison of colours (formerly described in DIN EN ISO 6271-1:2005-03) has been deleted, and the description of manufacture of the original platin
9、um-cobalt colour standards has been moved to Annex A. Previous editions DIN 53409: 1967-07 DIN ISO 6271: 1988-07, 1999-01 DIN EN ISO 6271-1: 2005-03 DIN EN ISO 6271-2: 2005-03 DIN EN ISO 6271:2016-05 3 National Annex NA (informative) Bibliography DIN EN ISO 15528, Paints, varnishes and raw materials
10、 for paints and varnishes Sampling DIN ISO 3696, Water for analytical laboratory use Specification and test methods DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measu
11、rement method DIN EN ISO 6271:2016-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6271 December 2015 ICS 87.060.20 Supersedes EN ISO 6271-1:2004, EN ISO 6271-2:2004English Version Clear liquids Estimation of colour by the platinum-cobalt colour scale (
12、ISO 6271:2015) Liquides clairs valuation de la couleur au moyen de lchelle platine-cobalt (ISO 6271:2015) Klare Flssigkeiten Bestimmung der Farbe nach der Platin-Cobalt-Farbskala (ISO 6271:2015) This European Standard was approved by CEN on 1 November 2015. CEN members are bound to comply with the C
13、EN/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 C
14、entre 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
15、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, Neth
16、erlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All ri
17、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6271:2015 EEN ISO 6271:2015 (E) 2 DIN EN ISO 6271:2016-05 Contents Page European foreword . 3 Foreword 4 1 Scope 5 2 Normative references 5 3 Principle . 5 4 Apparatus and materials 5 5 Sam
18、pling . 6 6 Procedure. 6 7 Expression of results 6 8 Precision . 6 8.1 General 6 8.2 Repeatability limit, r 6 8.3 Reproducibility limit, R . 6 8.4 Bias . 7 9 Test report . 7 Annex A (normative) Platinum-cobalt colour standards 8 Bibliography . 10 EN ISO 6271:2015 (E) 3 DIN EN ISO 6271:2016-05 Europe
19、an foreword This document (EN ISO 6271:2015) has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN. This European Standard shall be given the status of a national s
20、tandard, either by publication of an identical text or by endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. C
21、EN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 6271-1:2004, EN ISO 6271-2:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement th
22、is European Standard: 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, Netherlands, Norway, Poland, Portugal, Romania, Slovak
23、ia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6271:2015 has been approved by CEN as EN ISO 6271:2015 without any modification. ForewordISO (the International Organization for Standardization) is a worldwide federation of national standard
24、s 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 organiz
25、ations, 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 its fur
26、ther 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/directi
27、ves).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 the In
28、troduction 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 related to
29、 conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 6271 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods
30、 for binders for paints and varnishes, in collaboration with ASTM D 01.34, Naval Stores. It has been harmonized with ASTM D 1209-05, Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale).This third edition of ISO 6271 cancels and replaces ISO 6271-1:2004 and ISO 6271-2:2004, which
31、have been technically revised. The main changes are:a) both standards have been combined into one standard;b) the spectrophotometric method (formerly described in ISO 6271-2:2004) is the only one standardized now;c) the original visual comparison of colours (formerly described in ISO 6271-1:2004) ha
32、s been deleted, and the description of manufacture of the original platinum-cobalt colour standards has been moved to Annex A.EN ISO 6271:2015 (E) 4DIN EN ISO 6271:2016-05 1 ScopeThis International Standard specifies a spectrophotometric method for estimating the colour of clear liquids in terms of
33、platinum-cobalt units (Pt-Co units). It is applicable to clear liquids having a colour characteristic similar to those of the platinum-cobalt colour scale specified in Annex A. For products with colours more intense than the Pt-Co stock solution the method specified in ISO 4630 applies.The spectroph
34、otometric method provides a more precise way of measuring Pt-Co colour than a visual sample comparison by human eyes.NOTE The term “Pt-Co colour” used here is preferred over the terms “Hazen colour” and “APHA colour”.2 Normative referencesThe following referenced documents, in whole or in part, are
35、normally referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3696, Water for analytical laboratory use Specification a
36、nd test methodsISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement methodISO 15528, Paints, varnishes and raw materials for paints and varnishes SamplingCIE Publicat
37、ion No. 15:2004, Colorimetry3 PrincipleThe colour of a liquid sample is measured using an instrument capable of measuring transmitted colour and reporting in Pt-Co colours or in a colour system that can be converted into Pt-Co colours.4 Apparatus and materials4.1 Colour-measuring instrument, spectro
38、photometer capable of measuring transmitted colour (0/180 geometry) and reporting the results in the Pt-Co colour scale. If such an instrument is not available, one may be used which is capable of measuring transmitted colour and reporting in tristimulus values using standard illuminant C and the 2
39、observer, described in CIE Publication No. 15:2004.4.2 Absorption cells, 50 mm light path length recommended, unless a different path length is specified by the instrument manufacturer or4.3 Glass tubes, 11 mm path length. Glass test tubes designed for a specific instrument may be used. Glass tubes
40、might provide less accuracy in the very low colour range than 50 mm absorption cells and should be used only when a decrease in accuracy is tested and considered acceptable.EN ISO 6271:2015 (E) 5DIN EN ISO 6271:2016-05 5 SamplingTake a representative sample of the product to be tested, as described
41、in ISO 15528.6 ProcedureBaseline calibration of the instrument shall be performed following the instrument manufacturers recommendations.If the material shows any visual haziness, remove the haze e.g. by filtration, centrifugation, heating, ultrasonic treatment or any other suitable means (see Note)
42、.If the haziness cannot be removed, the measured value will be unreliable.Then, using the same type of glass tube or absorption cell as used for the baseline calibration, fill the glass tube or absorption cell with the product. Take care not to touch the measurement area of the glass tube or absorpt
43、ion cell.Avoid creating air bubbles when filling the glass tube or absorption cell. If air bubbles are formed and remain trapped, remove them by heating, vacuum, ultrasonic treatment or any other suitable means (see Note).NOTE Some sample pre-treatments can change the colour.Insert the glass tube or
44、 absorption cell in the instrument and measure the Pt-Co colour, following the instrument manufacturers recommended procedure.Regular checks as per the instrument manufacturers recommendations should be carried out. These will normally be in the form of checks with certified reference materials.7 Ex
45、pression of resultsReport the colour in Pt-Co colour units as given by the instrument.8 Precision8.1 GeneralThe precision of the test method was determined by inter-laboratory testing in accordance with ISO 5725-2.Four different materials were tested by 143 laboratories.8.2 Repeatability limit, rThe
46、 repeatability limit r is the value below which the absolute difference between two single test results, each the mean of duplicates, obtained on identical material by one operator in one laboratory within a short interval of time using the standardized test method can be expected to lie with a prob
47、ability of 95 %.The repeatability for three repeated measurements, made in accordance with this International Standard and expressed as the repeatability limit r, is 1,9 %, relative to the mean.8.3 Reproducibility limit, RThe reproducibility limit R is the value below which the absolute difference b
48、etween two test results, each the mean of duplicates, obtained on identical material by operators in different laboratories using the standardized test method can be expected to lie with a probability of 95 %.EN ISO 6271:2015 (E) 6DIN EN ISO 6271:2016-05 The reproducibility for three repeated measur
49、ements, made in accordance with this International Standard and expressed as the reproducibility limit R, is 4,8 %, relative to the mean.8.4 BiasSince there is no accepted reference material suitable for determining the bias of the procedure in this test method, bias has not been determined.9 Test reportThe test report shall contain at least the following information:a) all details necessary to identify the product examined;b) a reference to this International Sta
