EN ISO10253 EUROPEAN STANDARD NORMEEUROPEENNE EUROPAISCHENORM July 2024 ICS 13.060.70 Supersedes EN ISO 10253:2016 English Version Water quality -Marine algal growth inhibition test with Skeletonema sp.and Phaeodactylum tricornutum (ISO 10253:2024) Qualité de I'eau-Essaid'inhibition de la croissance des Wasserbeschaffenheit-Wachstumshemmtest mit algues marines avee Skeletonema sp.et Phaeodactylum marinenAlgen Skeletonema sp.und Phaeodactylum tricornutum(IS010253:2024) tricornutum(ISO10253:2024) This European Standard was approved by CENon 29 June 2024. CEN members arebound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards maybe obtained on applicationto the CEN-CENELECManagement Centre or to any CEN member. This European Standard exists in three official versions(English,French,German).A version in any other language made by translation under the responsibility ofaCEN member into its own language and notified to the CEN-CENELECManagement Centre has the same statusas theofficialversions, CEN members are the national standards bodies of Austria,Belgium,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia, Finland,France,Germany,Grece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg Malta,Netherlands,Norway. Poland,Portugal,Republic of North Macedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkiye and United Kingdom ces EUROPEAN COMMITTEE FOR STANDARDIZATION COMITEEUROPEENDENORMALISAT1ON EUROPXiSCHESKOMITEEFORNORMUNG CEN-CENELECManagement Centre:Rue de la Science 23,B-1040 Brussels 02024CEN Allrights ofexploitation in anyform and byany means reserved Ref.No.EN IS010253:2024 E worldwide for CEN national Members. EN IS010253:2024(E) Contents Page European foreword. el 2 EN ISO 10253:2024(E) European foreword This document (EN ISO 10253:2024)has been prepared by Technical Committee ISO/TC 147 "Water quality"in collaboration with Technical Committee CEN/TC 23O"Water analysis"the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard,either by publication of an identical text or by endorsement,atthe latest by January 2025,and conflicting national standards shall be withdrawn at the latest by January 2025. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.CEN shall not be held responsible for identifying any or all such patentrights. This document supersedes ENISO 10253:2016. Any feedback and questions on this document should be directed to the users'national standards body/national committee.A complete listing ofthesebodies can be found on the CEN website. According to the CEN-CENELEC Internal Regulations,the national standards organizations of the following countries are bound to implement this European Standard:Austria,Belgium,Bulgaria, Croatia,Cyprus,CzechRepublic,Denmark,Estonla,Finland,France,Germany,Greece,Hungary,Iceland, Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Republic of North Macedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Tirkiye and the United Kingdom. Endorsementnotice The text ofISO 10253:2024 has been approved by CEN as ENISO 10253:2024 without any modification 3