ENIS0 10253 EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM July 2024 ICS 13.060.70 Supersedes EN IS0 10253:2016 English Version Water quality - Marine algal growth inhibition test with Skeletonema sp. and Phaeodactylum tricornutum (IsO 10253:2024) Qualite de I'eau - Essai d'inhibition de la croissance des Wasserbeschaffenheit-Wachstumshemmtestmit algues marines avec Skeletonema sp. et Phaeodactylum marinen Algen Skeletonema sp. und Phaeodactylum tricornutum (IS0 10253:2024) tricornutum (IS0 10253:2024) This European Standard was approved by CEN on 29 June 2024. CEN members are bound 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 may be obtained on application to the CEN-CENELEC Management 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 translationundertheresponsibility ofaCENmemberintoitsownlanguageand notifiedtotheCEN-CENELECManagement Centrehasthe same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, 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, Turkiye and United Kingdom. cer EUROPEANCOMMITTEEFOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHESKOMITEEFURNORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels @2024CEN Ref. No. EN IS0 10253:2024 E All rights of exploitation in anyform and by any means reserved worldwidefor CENnational Members. EN IS0 10253:2024 (E) Contents Page 2 EN IS0 10253:2024 (E) European foreword This document (EN IS0 10253:2024) has been prepared by Technical Committee IS0/TC 147 "Water quality" in collaboration with Technical Committee CEN/TC 230 "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of an identical text or by endorsement, at the latest by January 2025, and conflicting national standards shall be withdrawn at the latest by January 2025.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 patent rights. This document supersedes EN IS0 10253:2016. Any feedback and questions on this document should be directed to the users' national standards body/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and the United Kingdom. Endorsement notice The text of IS0 10253:2024 has been approved by CEN as EN IS0 10253:2024 without any modification. 3