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1、BRITISH STANDARD BS EN ISO 6271-1:2004 BS 6782-12.1: 2004 Clear liquids Estimation of colour by the platinum-cobalt scale Part 1: Visual method The European Standard EN ISO 6271-1:2004 has the status of a British Standard ICS 87.060.20 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:0
2、4 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 6271-1:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 December 2004 BSI 16 December 2004 ISBN 0 580 45080 5 National foreword This British Standard is the official English langua
3、ge version of EN ISO 6271-1:2004. It is identical with ISO 6271-1:2004. It supersedes BS 6782-12:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee STI/3, Paints, media and related products, which has the responsibility to: A list of organizations r
4、epresented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence In
5、dex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself co
6、nfer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promul
7、gate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this docum
8、ent indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6271-1 November 2004 ICS 87.0
9、60.20 English version Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 1: Visual method (ISO 6271-1:2004) Liquides clairs - Evaluation de la couleur au moyen de lchelle platine-cobalt - Partie 1: Mthode visuelle (ISO 6271-1:2004) Klare Flssigkeiten - Bestimmung der Farbe nach
10、 der Platin-Cobalt-Skala - Teil 1: Visuelles Verfahren (ISO 6271- 1:2004) This European Standard was approved by CEN on 14 November 2004. 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 nationa
11、l standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any o
12、ther language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland,
13、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NOR
14、MUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6271-1:2004: E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (
15、c) BSI I NESO 26-17:12( 400E) 2 Foreword This document (EN ISO 6271-1:2004) 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
16、given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations o
17、f the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Sp
18、ain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 6271-1:2004 has been approved by CEN as EN ISO 6271-1:2004 without any modifications. EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATI
19、ONAL STANDARD ISO 6271-1 First edition 2004-11-15 Reference number ISO 6271-1:2004(E) OSI 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 EN ISO 62711:2004
20、 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO -17262:1)E(400 ii ISO 4002 All rithgs reresvde id FDPscalimer ThFDP si fam eliy ctnome niat deddebyepfa.sec In cacnadrociw eth sebodA sneciliycilop gn, thf siam elirp eb ytnide or viewb de
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23、re by ISO memdob rebsei. In eht kilnuyle evtne ttah a borplem retalit gno it si f,dnuo esaelp inform thtneC eral ceSrteraiat ta teh sserdda vigoleb new. IOS 4002 Alr lithgs reresv.de sselnU toesiwreh sficep,dei rap ont fo thbup silitaciam nocudorper eb yde or tuilidez na nif yorm ro by nam ysnae, tc
24、elerm ro cinoecinahcal, tohp gnidulcnicopom dna gniyicrfomli, tiwuoht repsimsi noin wrtif gnirtie mohI reSO ta the asserdd ebwol or ISOmem sreb obyd t nitnuoc ehry fo teh euqertsre. SIc Oopyright ofifce saCe soptael 65 -HCG 1121eneva 02 Te.l 22 14 + 10 947 11 Fax + 22 14 0 9479 74 Eam-il ocpyrithgio
25、s.ogr Web wwwi.soo.rg Pubni dehsil Stiwrezldna EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI -17264002:1)E( ISO 4002 r llAithgs reservde iii Contents Page 1Scope 1 2Normative references 1 3Terms and definitions 1 4Pri
26、nciple 1 5Reagents . 1 6Apparatus . 2 7Preparation of colour standards 2 8Sampling . 3 9Procedure . 3 10Expression of results 4 11Precision . 4 12Test report 4 EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO -17262:1)E(
27、400 iv ISO 4002 All rithgs reresvde 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 i
28、nterested 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 Electrotechn
29、ical 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 th
30、e 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
31、. ISO shall not be held responsible for identifying any or all 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 harm
32、onized with ASTM D 1209-97, Standard Test Method for Color of 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
33、platinum-cobalt scale: Part 1: Visual method Part 2: Spectrophotometric method EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI -17264002:1)E( ISO 4002 r llAithgs reservde v Introduction ISO 2211, Liquid chemical product
34、s 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 solution for colour matching (in one way only); checking of the stock solution; use of tubes with greater viewing de
35、pth 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 over the terms “Hazen colour” and “APHA colour”. EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon
36、Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI . vi 4002:11726 OSI NE Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ANRETNIITOTS LANDNADRAOSI -17264002:1)E( ISO 4002 r llAithgs reservde 1 Clear liquids Estimation of colour by t
37、he platinum-cobalt scale Part 1: Visual method 1Scope This part of ISO 6271 specifies a method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having colour characteristics similar to those of the reference platinum-cobalt scale. 2Normative references T
38、he following referenced documents are indispensable for the application of this document. 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 Spec
39、ification and test methods ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling 3Terms and definitions 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
40、 of the hexachloroplatinate(IV) ion, and cobalt(II) chloride hexahydrate in specified concentrations 4Principle The colour of a sample 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
41、is expressed in terms of Pt-Co units. 5Reagents During the test, use only reagents of recognized analytical grade and only water 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
42、mass), .38 % =1,19 g/ml EN ISO 62711:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:02:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO -17262:1)E(400 2 ISO 4002 All rithgs reresvde 6Apparatus Ordinary laboratory apparatus and glassware, together with the following: 6.1Colour compar
43、ison tubes, flat-bottomed, capacity, fitted with optically clear ground-glass caps. The tubes shall be matched with respect to the colour and the thickness of the glass and shall have a graduation mark between and above the bottom. The tubes shall be selected so that the graduation mark heights matc
44、h to within . 6.2Colour comparator, designed to permit visual comparison of light transmitted through the colour comparison tubes (6.1) along their longitudinal axis. The comparator shall be designed so that white light is passed through, or reflected off, a white glass plate and directed with equal
45、 intensity through the tubes, and shall be shielded so that no light enters the tubes from the sides. 6.3Spectrometer, capable of measuring light transmittance at , , and with an accuracy of 0,005 transmittance or better. 6.4Cells, of optical path length , for use with the spectrometer (6.3). 7Prepa
46、ration of colour standards 7.1Pt-Co stock solution, 500 Pt-Co units Into a beaker introduce of potassium hexachloroplatinate(IV) (5.1) and of cobalt(II) chloride hexahydrate (5.2). Add of water and of hydrochloric acid (5.3) and warm, if necessary, to obtain a clear solution. After cooling, transfer
47、 quantitatively to a one-mark volumetric flask, dilute to the mark with water and mix well. The stock solution prepared in this way shall have transmittances at , , and which lie within the limits specified in Table 1 when measured using the cells (6.4) in the spectrometer (6.3). 7.2Pt-Co standard m
48、atching solutions Prepare a series of standard matching solutions covering the range required (see Table 2). Place the indicated volumes of stock solution (7.1) into a series of colour comparison tubes (6.1), dilute to the mark with water and mix well. Cap the tubes, seal the caps with shellac or wa
49、terproof cement and mark the tubes with the corresponding Pt-Co number. 7.3Storage Store the stock solution (7.1) in a stoppered bottle in the dark. Under these conditions, this solution is stable for 1 year. The standard matching solutions (7.2) are stable for about 6 months when stored in the dark at room temperature. They must remain clear without any sediment but should preferably be prepared immediately before use. T