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The method was implemented on a sequential injection analysis (SIA) system and is based on the reduction of cerium(IV) in the presence of irradiated ILs. Compounds incorporating the chloride anion were found to exhibit higher COD values and 1\u2010butyl\u20103\u2010methylimidazolium chloride ([bmim]<jats:sup>+<\/jats:sup>[Cl]<jats:sup>\u2212<\/jats:sup>), 1\u2010butyl\u20101\u2010methylpyrrolidinium chloride ([bmpyr]<jats:sup>+<\/jats:sup>[Cl]<jats:sup>\u2212<\/jats:sup>), and1\u2010hexyl\u20103\u2010methylimidazolium chloride ([hmim]<jats:sup>+<\/jats:sup>[Cl]<jats:sup>\u2212<\/jats:sup>) also exhibited considerable photodegradability, whereas the cholinium cation and methanesulfonate and tetrafluoroborate anions showed resistance to photolysis. The developed methodology proved to be a simple, affordable, and robust method, showing good repeatability under the tested conditions (rsd &lt;3.5\u2009%, <jats:italic>n<\/jats:italic>=10). Therefore, it is expected that the developed approach can be used as a screening method for the preliminary evaluation of compounds\u2032 potential impact in the aquatic field. Additionally, the photolysis step presents an attractive option to promote degradation of ILs prior to their release into wastewater.<\/jats:p>","DOI":"10.1002\/cphc.201601416","type":"journal-article","created":{"date-parts":[[2017,2,19]],"date-time":"2017-02-19T22:22:48Z","timestamp":1487542968000},"page":"1351-1357","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Environmental Impact of Ionic Liquids: Automated Evaluation of the Chemical Oxygen Demand of Photochemically Degraded Compounds"],"prefix":"10.1002","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2866-1591","authenticated-orcid":false,"given":"Susana P. 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