BS ISO 22197-1:2007 Fine ceramics (advanced ceramics, advanced technical ceramics). Test method for air-purification performance of semiconducting photocatalytic materials-Removal of nitric oxide
2016BS ISO 22197-1:2016 Fine ceramics (advanced ceramics, advanced technical ceramics). Test method for air-purification performance of semiconducting photocatalytic materials. Removal of nitric oxide
2008BS ISO 22197-1:2007 Fine ceramics (advanced ceramics, advanced technical ceramics). Test method for air-purification performance of semiconducting photocatalytic materials-Removal of nitric oxide