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ISO 23734:2021

Marine technology — Marine environment impact assessment (MEIA) — On-board bioassay to monitor seawater quality using delayed fluorescence of microalga

Publication date:   Jul 27, 2021

General information

60.60 Standard published   Jul 27, 2021

ISO

ISO/TC 8/SC 13 Marine technology

International Standard

47.020.01   General standards related to shipbuilding and marine structures | 13.020.30   Environmental impact assessment

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Scope

This document specifies a bioassay for the determination of the presence of unknown toxic contaminants in test seawater (see Figure A.1). It is based on the inhibition of photosynthetic activity of the marine cyanobacterium Cyanobium sp. (NIES-981) by such toxic contaminants. The inhibition is determined based on delayed fluorescence (DF) intensity.
The method is rapid and requires less laboratory space than standard bioassays. Hence, it can be used on-board to generate basic data for seawater quality management at deep-sea mining sites where time and space are extremely limited.

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PUBLISHED
ISO 23734:2021
60.60 Standard published
Jul 27, 2021