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ILNAS-EN 15204:2006 Edition 08/2006
Water quality - Guidance standard on the enumeration of phytoplankton using inverted microscopy (Utermöhl technique)
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The procedure described in this European Standard is based on the standard settling technique as defined by Utermöhl in 1958 [31]. It describes a general procedure for the estimation of abundance and taxonomic composition of marine and freshwater phytoplankton by using inverted light microscopy and sedimentation chambers, including the preceding steps of preservation and storage. Emphasis is placed on optimizing the procedure for the preparation of the microscopic sample. Many of the general principles of the approach described may also be applied to other techniques of enumerating algae (or other entities) using a (conventional) microscope, some of which are described in Annex E. This guidance standard does not cover field collection of samples or the analysis of picoplankton, quantitative analysis of free-floating mats of Cyanobacteria or specific preparation techniques for diatoms.


Standard - Active


Technical Committee :
CEN/TC 230 : Water analysis


start of the vote on the project    31/03/2005   date of ratification (dor)    14/07/2006
end of the vote on the project    31/08/2005   date of anouncement (doa)    30/11/2006
start of the vote on the final project    13/04/2006   date of publication (dop)    28/02/2007
end of the vote on the final project    13/06/2006   date of withdrawal (dow)    28/02/2007

Publication Official Journal
of the Grand-Duchy of Luxembourg

International Classification for Standards (ICS codes) :

13.060.70 : Examination of biological properties of water


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