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EVS-EN 15204:2006

Water quality - Guidance standard on the enumeration of phytoplankton using inverted microscopy (Utermöhl technique)

General information
Valid from 06.11.2006
Base Documents
EN 15204:2006
Directives or regulations
None
Standard history
Status
Date
Type
Name
06.11.2006
Main
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.
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