Abstract:Microcystins are a group of potent cyclic heptapeptide toxins produced by cyanobacteria, which cause liver damage, and sometimes death in humans and aquatic animals. Therefore, monitoring these microcystins using mass spectroscopy is critical for the accurate detection, identification, and characterization of different microcystin variants, which provides a library of data for toxicity assessments, regulatory compliance, and environmental monitoring and management of water quality. In this report, mass spectra profiles of different microcystins produced by cyanobacteria from the SE Baltic Sea were presented. Mass spectral databases of different microcystin variants based on the molecular ion peak, precursor ions, and fragmentation patterns were entered into our library. This gives researchers in the field the ability to correlate with the production of specific microcystins and provides essential data for risk assessment and water resource management. Therefore,presenting the mass spectra profile of microcystins in this workshop is essential for researchers, scientists, and policymakers that provide hands-on training and technical knowledge on characterizing, analyzing, and understanding the mass spectra variations of different microcystin congeners.This is a joint work with Professor dr.hab Hana Mazure