BS ISO 10678-2010 Fine ceramics (advanced ceramics advanced technical ceramics) Determination of photocatalytic activity of surfaces in an aqueous medium by degradation of methylen.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10678:2010Fine ceramics (advancedceramics, advanced technicalceramics) Determinationof photocatalytic activity ofsurfaces in an aqueous mediumby degradation of methylenebl
2、ueBS ISO 10678:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 10678:2010.The UK participation in its preparation was entrusted to TechnicalCommittee RPI/13, Advanced technical ceramics.A list of organizations represented on this committee can beobtained o
3、n request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 63644 8ICS 81.060.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British
4、 Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2010.Amendments issued since publicationDate Text affectedBS ISO 10678:2010Reference numberISO 10678:2010(E)ISO 2010INTERNATIONAL STANDARD ISO10678First edition2010-09-15Fine ceramics (advanced ce
5、ramics, advanced technical ceramics) Determination of photocatalytic activity of surfaces in an aqueous medium by degradation of methylene blue Cramiques techniques Dtermination de lactivit photocatalytique des surfaces dans un milieu aqueux par dgradation du bleu de mthylne BS ISO 10678:2010ISO 106
6、78:2010(E) 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 performing the editing. In downloading
7、this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General
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9、low. COPYRIGHT PROTECTED DOCUMENT ISO 2010 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 addr
10、ess 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 ii ISO 2010 All rights reservedBS ISO 10678:2010ISO 10678:2010(E) ISO 20
11、10 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Terms and definitions .1 3 Symbols and units.2 4 Principle3 5 Apparatus.3 6 Calibration3 7 Measuring and conditioning solution .3 8 Sample preparation .4 9 Preparation of the measurement .4 10 Procedure of the measurement .5 11 Evaluatio
12、n of results .6 12 Precision.7 13 Test report7 Annex A (informative) Example of a data evaluation 8 Annex B (informative) Examples of suitable measuring devices 9 Annex C (informative) Results of the inter-laboratory test.11 Bibliography12 BS ISO 10678:2010ISO 10678:2010(E) iv ISO 2010 All rights re
13、servedForeword 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 interested in a subject for whi
14、ch 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 Electrotechnical Commission (IEC) on all m
15、atters 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 the technical committees are cir
16、culated 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. ISO shall not be held respon
17、sible for identifying any or all such patent rights. ISO 10678 was prepared by Technical Committee ISO/TC 206, Fine ceramics. BS ISO 10678:2010INTERNATIONAL STANDARD ISO 10678:2010(E) ISO 2010 All rights reserved 1Fine ceramics (advanced ceramics, advanced technical ceramics) Determination of photoc
18、atalytic activity of surfaces in an aqueous medium by degradation of methylene blue 1 Scope This International Standard specifies a method for the determination of the photocatalytic activity of surfaces by degradation of the dye molecule methylene blue (MB) in aqueous solution using artificial ultr
19、aviolet (UV) radiation, and characterizes the ability of photoactive surfaces to degrade dissolved organic molecules on ultraviolet radiation. The test method specified is also applicable to evaluation of the specific photocatalytic self-cleaning activity of surfaces covered with respective coatings
20、. This method is not applicable to characterizing the photoactivity of surfaces on visible illumination, regarding direct soiling, degradation of gaseous molecules and the determination of antimicrobial photoactivity of surfaces. NOTE Correlations between these different kinds of photocatalytic acti
21、vity can, however, exist, in particular at surfaces exhibiting low photonic efficiencies. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 specific photocatalytic activity PMB measure of the photochemical conversion NOTE Specific photocatalyti
22、c activity is expressed in moles per square metre and hour mol/(m2h). 2.2 photonic efficiency MB measure of the selectivity of the incident photons to induce the decolourization of methylene blue NOTE 1 Photonic efficiency is expressed as a percentage of the incident photon flux. NOTE 2 It is assume
23、d that one photon can induce the decolourization of one dye molecule. 2.3 test solution aqueous methylene blue solution used to determine the photocatalytic activity of surfaces BS ISO 10678:2010ISO 10678:2010(E) 2 ISO 2010 All rights reserved2.4 measuring solution part of test solution (2.3) with a
24、 volume of u 10 % of the volume of the test solution used for external determination of the optical absorbance employing a spectrophotometer 2.5 conditioning solution aqueous methylene blue solution used for the pre-adsorption of methylene blue on the test surfaces prior to the determination of the
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