ISO 22601:2019

INTERNATIONAL ISO
STANDARD 22601
First edition
2019-09
Fine ceramics (advanced ceramics,
advanced technical ceramics) — Test
method for determination of phenol
oxidative decomposition performance
of semiconducting photocatalytic
materials by quantitative analysis of
total organic carbon (TOC)
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Principle . 2
6 Materials . 3
6.1 Chemicals and implements . 3
6.1.1 Reagent . . 3
6.1.2 Purified water . 3
6.1.3 Purified air . 3
6.1.4 Purified water saturated with dissolved oxygen . 3
7 Test device and instrument . 3
7.1 Test vessel . 3
7.2 Reserve container . 3
7.3 UV irradiation light source . 4
7.4 UV radiometer . 4
7.5 UV light intensity . 4
7.6 pH meter . 4
7.7 TOC measuring device . 4
8 Arrangement of test method . 4
8.1 Measuring device setup . 4
8.2 Test solution feeding device . 4
8.3 Instruments for air flow . 5
9 Test material . 5
9.1 Test piece . 5
9.2 Pre-treatment of the test piece . 5
10 Procedure of the measurement . 6
10.1 Test temperature . 6
10.2 Other test condition . 6
10.3 Preparation for test . 6
10.4 Procedure of the measurement . 6
11 Evaluation of results . 7
11.1 Evaluation of dark condition . 7
11.2 Evaluation of illuminated condition . 7
11.3 Phenol oxidative decomposition performance . 7
11.4 Condition for establishing a successful test . 7
12 Test report . 8
Annex A (informative) Example of suitable test vessel . 9
Annex B (informative) Example of suitable test vessel .10
Annex C (informative) Example of test position of test vessel and suitable measuring device
component .11
Annex D (informative) Example of data evaluation .13
Annex E (informative) Results of the interlaboratory test .15
Foreword
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This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
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iv © ISO 2019 – All rights reserved

Introduction
Since photocatalysts have a wide range of functions such as purification of air or water, antibacterial
effect and self-cleaning, many application products that make use of said functions are developed.
Photocatalyst-applied products for water purification are expected to exert oxidative decomposing
performance against organic compounds composed of hydrocarbon, which is a water polluting
substance. In line with this, there is a necessity for developing a testing method for measuring the
oxidative decomposition against water polluting substances. This document stipulates a test method
for measuring the performance of a semiconducting photocatalytic material irradiated with UV
light in water for the oxidative decomposition of hydrocarbon such as phenol and the byproducts as
intermediate produced by the photocatalysis, by the TOC method.
An examples of data evaluation is given in Annex D while the results of the interlaboratory tests are
given in Annex E.
INTERNATIONAL STANDARD ISO 22601:2019(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Test method for determination of phenol
oxidative decomposition performance of semiconducting
photocatalytic materials by quantitative analysis of total
organic carbon (TOC)
1 Scope
This document provides a testing method for testing phenol oxidative decomposition performance
of semiconducting photocatalytic materials or made of a material adsorbed with photocatalyst to its
surface for the purpose of purifying water polluting substances in water making use of photocatalytic
performance as test piece. The test piece can be planar, spherical, flake or block shape. A test piece
that can elute hydrocarbon or the like by immersion into water or phenol aqueous solution or by light
irradiation, a semiconducting photocatalytic material that cannot maintain its shape or a powdery
semiconducting photocatalytic material are excluded from the scope of application, since they cannot
be evaluated.
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 8425, Water quality—Guidelines for the determination of total organic carbon (TOC) and dissolved
organic carbon (
...