{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T21:14:10Z","timestamp":1792790050399,"version":"4.5.0"},"reference-count":240,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T00:00:00Z","timestamp":1789344000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Science and Higher Education of the Republic of Kazakhstan","award":["AP23489214"],"award-info":[{"award-number":["AP23489214"]}],"id":[{"id":"https:\/\/ror.org\/05tyne317","id-type":"ROR","asserted-by":"crossref"}]},{"award":["AP23489214"],"award-info":[{"award-number":["AP23489214"]}],"id":[{"id":"https:\/\/ror.org\/05tyne317","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Toxins"],"abstract":"<jats:p>Cyanobacterial harmful algal blooms (cyanoHABs) typically involve the release of a wide spectrum of toxic metabolites produced by different cyanobacteria, which can cause adverse health effects in animals and humans. At the same time, many cyanobacteria are capable of producing more than one toxin simultaneously. As a result, the multiclass toxins released into aquatic environments can exert complex and combined effects on various ecosystem components. This review aims to provide an overview of the occurrence and effects of different cyanotoxins in aquatic systems and current analytical methods of their simultaneous detection. The main classes of cyanotoxins have been considered in this review. The occurrences, properties, and environmental and health impacts of these toxins are described. The main methods for cyanobacterial toxin analysis are covered. A comprehensive review and analysis of liquid chromatography-tandem mass spectrometry (LC-MS\/MS) detection and sample preparation approaches used to identify various classes of cyanotoxins is provided, together with a practical decision tree for analytical workflow selection according to toxin class and sample matrix, highlighting key trends and outlining directions for further research in this area.<\/jats:p>","DOI":"10.3390\/toxins18090395","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T14:15:04Z","timestamp":1789395304000},"page":"395","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multiclass Cyanotoxins in Aquatic Environments: Occurrence, Impacts and Detection Techniques"],"prefix":"10.3390","volume":"18","author":[{"given":"Galina","family":"Nugumanova","sequence":"first","affiliation":[{"name":"Nazarbayev University Research Administration, Nazarbayev University, Astana 010000, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Chorus, I., and Welker, M. 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