BS IS0 22197-4:2021 BSl Standards Publication Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for air-purification performance of semiconducting photocatalytic materials Part 4: Removal of formaldehyde bsi. BSIS022197-4:2021 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of IS022197-4:2021.It supersedes BS IS0 22197-4:2013, which is withdrawn. TheUKparticipation inits preparation was entrustedto Technical CommitteeRPI/13,Advancedtechnicalceramics. A list of organizations represented on this committee can be obtained on requestto its committee manager. Contractualandlegalconsiderations This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will bemade, and no responsibility or liability is or will be reasonableness of this publication. All and any such responsibility and liability is expresslydisclaimed tothe full extent permitted bythe law. This publication is provided as is, and is to be used at the recipient's own risk. The recipient is advised to consider seeking professional guidance with respectto itsuse ofthispublication. This publication is not intended to constitute a contract. Users are responsible for its correctapplication. @TheBritishStandardsInstitution2021 Published byBSI Standards Limited 2021 ISBN9780539152104 ICS 81.060.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the StandardsPolicyandStrategyCommitteeon31July2021. Amendments/corrigenda issued sincepublication Date Textaffected BSISO22197-4:2021 INTERNATIONAL ISO STANDARD 22197-4 Second edition 2021-07-05 Fine ceramics (advanced ceramics advanced technical ceramics) - Test method for air-purification performance of semiconducting photocatalytic materials - Part 4: Removal of formaldehyde Ceramiques techniques-Methodesd'essairelatives a la performance des materiauxphotocatalytiques semi-conducteurspourla purification de I'air - Partie 4:Elimination du formaldehyde Reference number ISO 22197-4:2021(E) ISO @IS0 2021