Fine ceramics (advanced ceramics, advanced technical ceramics). Test method for air-purification performance of semiconducting photocatalytic materials - Removal of formaldehyde1 Scope This part of ISO 22197 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 illumination with ultraviolet light (UV A). This part of ISO 22197 is intended for

NOTE 2 An internal quality control procedure for all methods specified in this International Standard is given in Annex A

New recommendations for the determination of the centre of gravity

NOTE 1: For some types of flexible cables

BS 1873 on the specifications for steel globe and globe stop and check valves is useful for:

ISO 17072-1 is especially suitable for determining the extractable chromium in chromium-tanned leathers

BS EN 60619 provides performance methods that help to check the performance of the electrically operated food preparation appliances

BS 4789 includes several specifications like Properties and test methods

rubber tyred gantry cranes (RTGs)

examples are products for the furnishing of spaces such as benches

flower boxes

Partition into multiple parts numbered 5-2

This British Standard specifies requirements for nickel-chromium-iron- titanium-niobium-aluminium heat-resisting alloy round wire with a maximum diameter of 2 mm for thread inserts