BS ISO 18071:2016 pdf download

BS ISO 18071:2016 pdf download.Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of antiviral activity of semiconducting photocatalytic materials under indoor lighting environment
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
5 Principle
The test method is suitable for use in development, comparison, quality assurance, characterization, reliability and design data generation of indoor-light-active photocatalytic materials. The method is used to obtain the antiviral activity of indoor-light-active photocatalytic materials by the contact of a specimen with bacteriophage under indoor lighting condition. The method is suitable for use with flat sheet, board or plate-shaped materials. The specimen of indoor-light-active photocatalytic treated material is inoculated with bacteriophage suspension and exposed to light for a specified period. Following exposure, the test suspension is removed and measured by the plaque forming method with Escherichia coli which is sensitive to bacteriophage Q-beta. The results obtained are compared with those obtained from inoculated specimens of non-photocatalytic treated material exposed to light under identical conditions to the treated material and to those obtained from inoculated specimens of both photocatalytic treated and non-treated material kept in the dark for the same period of time.