ISO/NP 25127

Water Quality — Determination of photosystem II inhibition in unicellular green algae

Scope

This document describes the procedure and evaluation of an algae photosystem II inhibition assay, which is an experimental method for detecting the inhibitory effects of environmental chemicals or samples on the photosystem II of unicellular green algae after 2 h exposure, and optionally on their growth during 24 h.
This assay procedure is suitable for the analysis of individual or mixtures of substances as well as native and extracted aqueous environmental samples, such as:
• treated municipal and industrial waste water
• fresh water
• aqueous extracts and leachates
• eluates of soils and fresh water sediments
• pore water of fresh water sediments