ISO/PRF 10678
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of photocatalytic activity of surfaces in an aqueous medium by degradation of methylene blue
Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of photocatalytic activity of surfaces in an aqueous medium by degradation of methylene blue
ISO 10678:2010 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 ultraviolet (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. 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.
Céramiques techniques — Détermination de l'activité photocatalytique des surfaces dans un milieu aqueux par dégradation du bleu de méthylène
L'ISO 10678:2010 spécifie une méthode de détermination de l'activité photocatalytique des surfaces par dégradation de la molécule du colorant bleu de méthylène (BM) dans une solution aqueuse au moyen d'une irradiation ultraviolette (UV) artificielle et il caractérise la capacité des surfaces photoactives à dégrader des molécules organiques dissoutes sous un rayonnement ultraviolet. La méthode d'essai spécifiée est applicable également à l'évaluation de l'activité autonettoyante spécifique par photocatalyse de surfaces pourvues de revêtements respectifs. Cette méthode n'est pas applicable à la caractérisation de la photoactivité de surfaces exposées à un éclairage en lumière visible s'agissant de salissures, de la dégradation de molécules gazeuses et de la détermination de la photoactivité antimicrobienne des surfaces.
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ISO 10678
Second edition
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Determination of photocatalytic
activity of surfaces in an aqueous
medium by degradation of
methylene blue
Céramiques techniques — Détermination de l'activité
photocatalytique des surfaces dans un milieu aqueux par
dégradation du bleu de méthylène
PROOF/ÉPREUVE
Reference number
ISO 10678:2024(en) © ISO 2024
ISO 10678:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 10678:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 2
5 Principle . 3
6 Apparatus . 3
6.1 General .3
6.2 Measuring device .3
6.3 Glass pane .3
6.4 Light source .3
6.5 UV radiometer .3
6.6 Photometer or UV/visible spectrometer .4
6.7 Measuring cuvette .4
6.8 Magnetic stirrer .4
7 Calibration . 4
8 Testing and conditioning solutions . 4
9 Preparation of the test specimens . 4
10 Preparation of the measurement . 5
11 Measurement procedure . 5
11.1 General .5
11.2 Testing with intermittently stirred test cylinders (method A) .6
11.3 Testing with continuously stirred test cells (method B) .6
12 Evaluation of results . 6
12.1 General .6
12.2 Specific degradation rate R .6
12.3 Photon irradiance E .7
P
12.4 Average irradiance E .7
av
12.5 Average photon irradiance E .7
P,av
12.6 Specific photocatalytic activity P .7
MB
12.7 Photonic efficiency ζ .7
MB
13 Precision . 7
13.1 Repeatability .7
13.2 Reproducibility .7
14 Test report . 8
Annex A (informative) Example of an evaluation . 9
Annex B (informative) Examples of measuring devices .11
Annex C (informative) Interlaboratory test results .13
Bibliography . 14
PROOF/ÉPREUVE
iii
ISO 10678:2024(en)
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 interested 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of
(a) patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
This second edition cancels and replaces the first edition (ISO 10678:2010), which has been technically
revised.
The main changes are as follows:
— normative references have been updated;
— procedures for “Testing with intermittently stirred test cylinders” and “Testing with continuously
stirred test cells” as “method A” and “method B” have been clarified and the whole document has been
revised accordingly;
— precision data and interlaboratory test results for both methods have been updated and included in
Annex C;
— document has been editorially revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
PROOF/ÉPREUVE
iv
International Standard ISO 10678:2024(en)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Determination of photocatalytic activity of surfaces
in an aqueous medium by degradation of methylene blue
1 Scope
This document specifies a method for the determination of the photocatalytic activity of surfaces by means
of degradation of methylene blue (MB) in an aqueous medium under artificial irradiation, and characterises
photocatalytically active surfaces with respect to their activity for degradation of dissolved organic
molecules under radiant exposure to ultraviolet light.
This document does not apply for the characterization of surfaces with respect to their photocatalytic
activity under visible light. A correlation of photocatalytic activity with the removal of direct soiling, the
degradation of gaseous molecules in the environmental air or the antimicrobial efficacy can exist, especially
for surfaces with low photonic efficiency.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 10677, Fine ceramics (advanced ceramics, advanced technical ceramics) — Ultraviolet light source for
testing semiconducting photocatalytic materials
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
specific photocatalytic activity
P
MB
measure for the photochemical conversion
Note 1 to entry: P is expressed in moles per square metre and hour [mol/(m ∙h)].
MB
3.2
photonic efficiency
ζ
MB
measure for the selectivity of the incident photons for methylene blue decolouration
Note 1 to entry: It is assumed that one photon is sufficient for the decolouration of a molecule.
Note 2 to en
...
2023-11-30
ISO/DISPRF 10678:2024(E)
ISO /TC 206/ WG 9
Secretariat: JISC
Fine ceramics (advanced ceramics, advanced technical ceramics) —
Determination of photocatalytic activity of surfaces in an aqueous
medium by degradation of methylene blue
Céramiques techniques — Détermination de l'activité photocatalytique des surfaces dans un milieu aqueux par
dégradation du bleu de méthylène
PROOF
ISO/DISPRF 10678:2024(Een)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2024 – All rights reserved
ii
ISO/DISPRF 10678:2024(Een)
Contents
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 2
5 Principle . 3
6 Apparatus . 3
7 Calibration . 4
8 Testing and conditioning solutions . 4
9 Preparation of the test specimens . 4
10 Preparation of the measurement . 5
11 Measurement procedure . 6
12 Evaluation of results . 7
13 Precision . 9
14 Test report . 9
Annex A (informative) Example of an evaluation . 10
Annex B (informative) Examples of measuring devices . 14
Annex C (informative) Interlaboratory test results . 17
Bibliography . 19
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations . 2
5 Principle . 3
6 Apparatus . 3
6.1 General . 3
6.2 Measuring device . 3
6.3 Glass pane . 3
6.4 Light source . 4
6.5 UV radiometer . 4
6.6 Photometer or UV/visible spectrometer . 4
6.7 Measuring cuvette . 4
6.8 Magnetic stirrer . 4
7 Calibration . 4
8 Testing and conditioning solutions . 4
9 Preparation of the test specimens . 5
© ISO 2024 – All rights reserved
iii
ISO/DISPRF 10678:2024(Een)
10 Preparation of the measurement . 5
11 Measurement procedure . 6
11.1 General . 6
11.2 Testing with intermittently stirred test cylinders (method A) . 6
11.3 Testing with continuously stirred test cells (method B) . 7
12 Evaluation of results . 7
12.1 General . 7
12.2 Specific degradation rate R . 7
12.3 Photon irradiance E . 7
P
12.4 Average irradiance E . 8
av
12.5 Average photon irradiance E . 8
P,av
12.6 Specific photocatalytic activity P . 8
MB
12.7 Photonic efficiency ζ . 8
MB
13 Precision . 8
13.1 Repeatability . 8
13.2 Reproducibility . 8
14 Test report . 8
Annex A (informative) Example of an evaluation . 10
A.1 Evaluation example for measurements including test cylinders . 10
A.2 Evaluation example for measurements including test cells . 10
Annex B (informative) Examples of measuring devices . 13
B.1 Assembly of the measuring device including test cylinders . 13
B.2 Assembly of the measuring device including test cells . 13
Annex C (informative) Interlaboratory test results . 15
Bibliography . 17
iv © ISO 2024 – All rights reserved
iv
ISO/DISPRF 10678:2024(Een)
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 interested 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents.www.iso.org/patents. ISO shall not be held responsible for identifying any or all such
patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
This second edition cancels and replaces the first edition (ISO 10678:2010), which has been technically
revised.
The main changes are as follows:
— — normative references have been updated;
— — procedures for “Testing with intermittently stirred test cylinders” and “Testing with continuously
stirred test cells” as “method A” and “method B” have been clarified and the whole document has been
revised accordingly;
— — precision data and interlaboratory test results for both methods have been updated and included in
Annex C;Annex C;
— — document has been editorially revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.htmlwww.iso.org/members.html.
© ISO 2024 – All rights reserved
v
Fine ceramics (advanced ceramics, advanced technical ceramics) —
Determination of photocatalytic activity of surfaces in an aqueous
medium by degradation of methylene blue
1 Scope
This document specifies a method for the determination of the photocatalytic activity of surfaces by means of
degradation of methylene blue (MB) in an aqueous medium under artificial irradiation, and characterises
photocatalytically active surfaces with respect to their activity for degradation of dissolved organic molecules
under radiant exposure to ultraviolet light.
This document does not apply for the characterization of surfaces with respect to their photocatalytic activity
under visible light. A correlation of photocatalytic activity with the removal of direct soiling, the degradation
of gaseous molecules in the environme
...
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