BS-EN-ISO-787-9-1995.pdf
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1、BRITISH STANDARD BS EN ISO 787-9:1995 Incorporating Amendment No. 1 General methods of test for pigments and extenders Part 9: Determination of pH value of aqueous suspension The European Standard EN ISO 787-9:1995 has the status of a British Standard BS EN ISO 787-9:1995 This British Standard, havi
2、ng been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1982 BSI 04-2000 First published March 1974 First revision November 1982 The following BSI references relate to t
3、he work on this standard: Committee reference PVC/1 Draft for comment 80/50282 DC ISBN 0 580 12941 1 Amendments issued since publication Amd. No.Date of issueComments 8512August 1995Indicated by a sideline in the margin BS EN ISO 787-9:1995 BSI 04-2000i Contents Page National forewordii Foreword2 Te
4、xt of EN ISO 787-93 Publication referred toInside back cover BS EN ISO 787-9:1995 ii BSI 04-2000 National foreword This revision of Part C4 of BS 3483 has been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee. It is identical with ISO 787-9 “General methods of t
5、est for pigments and extenders Part 9: Determination of pH value of an aqueous suspension” published in 1981 by the International Organization for Standardization (ISO). In 1994 the European Committee for Standardization (CEN) accepted ISO 787-9:1981 as European Standard EN ISO 787-9:1995. As a cons
6、equence of implementing the European Standard this British Standard is renumbered as BS EN ISO 787-9 and any reference to BS 3483-C4 should be read as a reference to BS EN ISO 787-9. This Part of BS 3483 supersedes BS 3483-C4:1974 which is withdrawn. Terminology and conventions. The text of the Inte
7、rnational Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used throughout as a decimal m
8、arker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “This part of ISO 787” and “International Standard” appear, referring to this standard, they should be read as “This Part of BS 3483” and “British Standard” respectively.
9、Additional information. In the last paragraph of clause 6 of ISO 787-9:1981, it is stated that the procedure is to be repeated if the duplicate determinations differ by more than 0,3 unit. In implementing this standard in the United Kingdom, it is recommended that, if repeat determinations are neces
10、sary, wherever possible both the sampling (clause 5) and the procedure (clause 6) should be repeated. In paragraph 1 of clause 6, the room temperature is unspecified. It is recommended that the temperature of the test should be 23 2 C.1) A British Standard does not purport to include all the necessa
11、ry provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN I
12、SO title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-reference International StandardCorresponding British Stand
13、ard ISO 842:1974BS 4726:1971 Methods for sampling raw materials for paints and varnishes (Technically equivalent) 1) These changes have been reported to the ISO in a proposal to amend the text of the International Standard. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 787-9 March 1995 IC
14、S 87.060.10 Descriptors: Paints, pigments, tests, chemical analysis, determination of content, pH English version General methods of test for pigments and extenders Part 9: Determination of pH value of aqueous suspension (ISO 787-9:1981) Mthodes gnrales dessai des pigments et matires de charge Parti
15、e 9: Dtermination du pH dune suspension aqueuse (ISO 787-9:1981) Allgemeine Prfverfahren fr Pigmente und Fllstoffe Teil 9: Bestimmung des pH-Wertes einer wrigen Suspension (ISO 787-9:1981) This European Standard was approved by CEN on 1994-10-17. CEN members are bound to comply with the CEN/CENELEC
16、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 Central Secretariat or to any CEN m
17、ember. 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 Central Secretariat has the same status as the official versions. CEN memb
18、ers are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisch
19、es Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN ISO 787-9:1995 E EN ISO 787-9:1995 BSI 04-2000 2 Foreword This European Standard
20、has been taken over by the Technical Committee CEN/TC 298, Pigments and extenders, from the work of ISO/TC 35, Paints and varnishes, of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard, either by publication of an ident
21、ical text or by endorsement, at the latest by September 1995, and conflicting national standards shall be withdrawn at the latest by September 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Fi
22、nland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 0Introduction3 1Scope and field of application3 2Reference3 3Reagent3 4Apparatus3 5Sampling3 6Procedure3 7Expression of results3
23、8Test report4 EN ISO 787-9:1995 BSI 04-20003 0 Introduction This document is a part of ISO 787, General methods of test for pigments and extenders. 1 Scope and field of application This part of ISO 787 specifies a general method of test for determining the pH value of an aqueous suspension of a samp
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