ISO 18071-2016 精细陶瓷 (高级陶瓷, 高级工业陶瓷). 室内照明环境下半导体光催化材料的抗病毒活性的测定. 采用噬菌体Q-β的试验方法

ISO 18071:2016 Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of antiviral activity of semiconducting photocatalytic materials under indoor lighting environment — Test method using bacteriophage Q-beta

 

Introduction

This International Standard applies to testing the antiviral activity of indoor-light-active photocatalytic ceramics and other materials produced by either coating or mixing of a light-active photocatalyst. The International Standard for testing the antibacterial activity of photocatalytic materials has been published as ISO 27447 and the International Standard for testing the antibacterial activity of indoor-light-active photocatalytic materials has been published as ISO 17094. The International Standard for determination of antiviral activity of semiconducting photocatalytic materials has also been published as ISO 18061.

The test method for cloths or textiles is not included in this International Standard because of lack of indoor-light-active photocatalytic cloths or textiles. When the indoor-light-active photocatalytic cloths or textiles with antiviral activity using indoor-light-active photocatalytic activity have been developed, a test method for indoor-light-active photocatalytic cloths or textiles will be proposed with the glass adhesion method in ISO 27447.

WARNING Only personnel trained in microbiological techniques should carry out tests.

 

1   Scope

This International Standard specifies the determination of the antiviral activity of materials that contain indoor-light-active photocatalytic materials or have indoor-light-active photocatalytic films on the surface by a test method that measures the infectivity titre of bacteriophage Q-beta after illumination with indoor light.

NOTE In the test method, the surrogate microbe is bacteriophage Q-beta, intended as a model for influenza viruses.

 

This International Standard is intended for use with different kinds of indoor-light-active photocatalytic materials used in construction materials, in flat sheet, board or plate shape that are the basic forms of materials for various applications. It does not include powder, granular or porous indoor-light-active photocatalytic materials.

This International Standard is applicable to indoor-light-active photocatalytic materials produced for an antiviral applications. Other types of performance of indoor-light-active photocatalytic materials, i.e. antibacterial activity, antifungal activity, decomposition of water contaminants, self-cleaning, antifogging and air purification, are not determined by this method.

 

2   Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 14605, Fine ceramics (advanced ceramics, advanced technical ceramics) — Light source for testing semiconducting photocatalytic materials used under indoor lighting environment

ISO 27447, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials

ISO 80000-1, Quantities and units — Part 1: General

 

3   Terms and definitions

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

3.1

photocatalyst

substance that carries out many functions based on oxidization and reduction reactions under photoirradiation, including decomposition and removal of air and water contaminants, deodorization, and antiviral, antibacterial, antifungal, self-cleaning and antifogging actions

3.2

indoor-light-active photocatalyst

substance that reacts with artificial light source for general lighting service (i.e. indoor lighting environment)

3.3

indoor lighting environment

environment with artificial light source for general lighting service

Note 1 to entry: Does not include sunlight.

3.4

indoor-light-active photocatalytic materials

materials in which or on which the indoor-light-active photocatalyst is added by coating, impregnation, mixing, etc.

3.5

antiviral

condition decreasing the infectivity of viruses on the surface of materials

3.6

bacteriophage

type of virus which infects bacteria

Note 1 to entry: The bacteriophage used in this International Standard is Q-beta that is one of F-specific RNA phages. The bacteriophage Q-beta is not pathogenic to humans and animals, but serves to simulate Influenza viruses that are pathogenic to humans.

3.7

plaque

visible, clear area which is theoretically the result of infection and lysis of host cells by a single viable bacteriophage

3.8

indoor-light-active photocatalyst antiviral activity value

difference between the logarithms of the total number of bacteriophage plaques on photocatalytic treated materials after indoor light illumination and on non-treated materials after indoor light illumination

Note 1 to entry: This value includes the decrease of number of bacteriophage plaques without indoor light illumination.

3.9

indoor-light-active photocatalyst antiviral activity value for indoor light illumination

difference between the logarithms of the total number of bacteriophage plaques on photocatalytic treated materials after indoor light illumination and on photocatalytic treated materials kept in a dark place