ISO 22197-5:2021 ファインセラミック（アドバンスドセラミック、アドバンストテクニカルセラミック）—半導体光触媒材料の空気清浄性能の試験方法—パート5：メチルメルカプタンの除去 | ページ 2

Foreword

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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 documents 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 ).

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This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.

This second edition cancels and replaces the first edition (ISO 22197-5:2013), which has been technically revised.

The main changes to the previous edition are as follows:

• references to ISO 2718 (withdrawn), ISO 4677-1 (withdrawn), ISO 4892-3 and ISO 6145-7 deleted from Clause 2;
• precaution relating to the handling of methyl mercaptan added to 6.1;
• gas flow measurement changed from dry-gas basis to wet-gas basis in 6.2;
• tolerance on dimensions of test piece changed in Clause 7;
• procedures for removing water-soluble contaminants added to 8.2;
• valid dark concentration level of methyl mercaptan changed in 8.3;
• criterion for acceptable adsorption of methyl mercaptan added to Clause 9.

A list of all parts in the ISO 22197 series can be found on the ISO website.

1 Scope

This document specifies a test method for the determination of the air-purification performance of materials that contain a photocatalyst or have photocatalytic films on the surface, usually made from semiconducting metal oxides, such as titanium dioxide or other ceramic materials, by continuous exposure of a test piece to the model air pollutant under irradiation with long-wave ultraviolet (UV) light. This document is intended for use with different kinds of materials, such as construction materials in flat sheet, board or plate shape, that are the basic forms of materials for various applications. This document also applies to structured filter materials including honeycomb-form, woven and non-woven fabrics, and to plastic or paper materials if they contain ceramic microcrystals and composites. This document does not apply to powder or granular photocatalytic materials.

This test method is usually applicable to photocatalytic materials produced for air purification. This method is not suitable for the determination of other performance attributes of photocatalytic materials, i.e. decomposition of water contaminants, self-cleaning, antifogging and antibacterial actions. It concerns the removal of methyl mercaptan.

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.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography