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The review also covers the analysis of new synthetic opioids, their parent compounds, and corresponding metabolites in body fluids, such as urine, blood, serum, and plasma, necessary for a fast and accurate diagnosis of intoxication. Identifying and quantifying these addictive and illicit substances and their metabolites is necessary for clinical, toxicological, and forensic purposes. As a reaction to the growing number of new synthetic opioid intoxications and increasing fatalities observed over the past ten years, we provide thorough background for developing new biosensors, screen-printed electrodes, or other point-of-care devices.<\/jats:p>","DOI":"10.3390\/bios12010026","type":"journal-article","created":{"date-parts":[[2022,1,5]],"date-time":"2022-01-05T20:42:16Z","timestamp":1641415336000},"page":"26","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Electroanalysis of Fentanyl and Its New Analogs: A Review"],"prefix":"10.3390","volume":"12","author":[{"given":"Marta Katarzyna","family":"Choi\u0144ska","sequence":"first","affiliation":[{"name":"J. Heyrovsk\u00fd Institute of Physical Chemistry of the Czech Academy of Sciences, Dolej\u0161kova 3, 182 23 Prague, Czech Republic"},{"name":"UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2799-1604","authenticated-orcid":false,"given":"Ivana","family":"\u0160est\u00e1kov\u00e1","sequence":"additional","affiliation":[{"name":"J. Heyrovsk\u00fd Institute of Physical Chemistry of the Czech Academy of Sciences, Dolej\u0161kova 3, 182 23 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8109-8529","authenticated-orcid":false,"given":"Vojt\u011bch","family":"Hrdli\u010dka","sequence":"additional","affiliation":[{"name":"J. 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