ISO-6271-1-2004.pdf
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1、INTERNATIONAL STANDARD ISO 6271-1 First edition 2004-11-15 Reference number ISO 6271-1:2004(E) ISO 2004 Clear liquids Estimation of colour by the platinum-cobalt scale Part 1: Visual method Liquides clairs valuation de la couleur au moyen de lchelle platine- cobalt Partie 1: Mthode visuelle ISO 6271
2、-1:2004(E) ii ISO 2004 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer perform
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5、retariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the a
6、ddress below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 6271-1:2004(E) ISO 2004 All rights reserved iii Contents Page 1Sc
7、ope 1 2Normative references 1 3Terms and definitions 1 4Principle 1 5Reagents . 1 6Apparatus . 2 7Preparation of colour standards 2 8Sampling . 3 9Procedure . 3 10Expression of results 4 11Precision . 4 12Test report 4 -,-,- ISO 6271-1:2004(E) iv ISO 2004 All rights reserved Foreword ISO (the Intern
8、ational 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 b
9、een 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 sta
10、ndardization. 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 f
11、or 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 a
12、ll such patent rights. ISO 6271-1 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 10, Test methods for binders for paints and varnishes, in collaboration with ASTM D 01.34, Naval Stores. It has been harmonized with ASTM D 1209-97, Standard Test Method for Color o
13、f Clear Liquids (Platinum-Cobalt Scale). This first edition cancels and replaces ISO 6271:1997, which has been technically revised. ISO 6271 consists of the following parts, under the general title Clear liquids Estimation of colour by the platinum-cobalt scale: Part 1: Visual method Part 2: Spectro
14、photometric method ISO 6271-1:2004(E) ISO 2004 All rights reserved v Introduction ISO 2211, Liquid chemical products Measurement of colour in Hazen units (platinum-cobalt scale), is not suitable for use in the paint industry. ISO 6271-1 differs from ISO 2211 in respect to: preparation of the stock s
15、olution for colour matching (in one way only); checking of the stock solution; use of tubes with greater viewing depth to obtain a more distinct difference between successive colour standards; the single test procedure given is more accurate. The term “platinum-cobalt colour” used here is preferred
16、over the terms “Hazen colour” and “APHA colour”. . vi -,-,- INTERNATIONAL STANDARDISO 6271-1:2004(E) ISO 2004 All rights reserved 1 Clear liquids Estimation of colour by the platinum-cobalt scale Part 1: Visual method 1Scope This part of ISO 6271 specifies a method for estimating the colour, in Pt-C
17、o units, of clear liquids. It is applicable to clear liquids having colour characteristics similar to those of the reference platinum-cobalt scale. 2Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition
18、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3696, Water for analytical laboratory use Specification and test methods ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3Terms and definition
19、s For the purposes of this document, the following terms and definitions apply. 3.1 Pt-Co scale classification of the colour of a solution containing platinum, in the form of the hexachloroplatinate(IV) ion, and cobalt(II) chloride hexahydrate in specified concentrations 4Principle The colour of a s
20、ample of the product to be tested is compared with those of colour standards. The standard that most closely matches the colour of the sample is identified and the result is expressed in terms of Pt-Co units. 5Reagents During the test, use only reagents of recognized analytical grade and only water
21、of at least grade 3 purity as defined in ISO 3696. 5.1Potassium hexachloroplatinate(IV), K2PtCl6. 5.2Cobalt(II) chloride hexahydrate, CoCl26H2O. 5.3Hydrochloric acid, (by mass), .38 % =1,19 g/ml ISO 6271-1:2004(E) 2 ISO 2004 All rights reserved 6Apparatus Ordinary laboratory apparatus and glassware,
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