ISO 23734:2021
								
									
									International Standard
								
								
								
									 
									Current Edition
									
								
								
									·
									Approved on
									27 July 2021
								
							
							Marine technology — Marine environment impact assessment (MEIA) — On-board bioassay to monitor seawater quality using delayed fluorescence of microalga
ISO 23734:2021 Files
													English
													
														17 Pages
													
												
												
													
														Current Edition
														
													
													
												
			                                
													43.82 OMR
												
			                                
			                                
			                            ISO 23734:2021 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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