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Photolysis and photocatalysis of ibuprofen in aqueous medium: characterization of by-products via liquid chromatography coupled to high-resolution mass spectrometry and assessment of their toxicities against Artemia salina.

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Photolysis and photocatalysis of ibuprofen in aqueous medium: characterization of by-products via liquid chromatography coupled to high-resolution mass spectrometry and assessment of their toxicities against Artemia salina.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	da Silva, Júlio César Cardoso Teodoro, Janaina Aparecida Reis Afonso, Robson José de Cássia Franco Aquino, Sérgio Francisco Augusti, Rodinei
Description	Country affiliation: Brazil Author Affiliation: da Silva JC ( Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil.)
Abstract	The degradation of the pharmaceutical compound ibuprofen (IBP) in aqueous solution induced by direct photolysis (UV-A and UV-C radiation) and photocatalysis (TiO2 /UV-A and TiO2 /UV-C systems) was evaluated. Initially, we observed that whereas photocatalysis (both systems) and direct photolysis with UV-C radiation were able to cause an almost complete removal of IBP, the mineralization rates achieved for all the photodegradation processes were much smaller (the highest value being obtained for the TiO2 /UV-C system: 37.7%), even after an exposure time as long as 120 min. Chemical structures for the by-products formed under these oxidative conditions (11 of them were detected) were proposed based on the data from liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS) analyses. Taking into account these results, an unprecedented route for the photodegradation of IBP could thus be proposed. Moreover, a fortunate result was achieved herein: tests against Artemia salina showed that the degradation products had no higher ecotoxicities than IBP, which possibly indicates that the photocatalytic (TiO2 /UV-A and TiO2 /UV-C systems) and photolytic (UV-C radiation) processes can be conveniently employed to deplete IBP in aqueous media.
File Format	HTM / HTML
ISSN	10765174
Issue Number	2
Volume Number	49
e-ISSN	10969888
Journal	Journal of Mass Spectrometry
Language	English
Publisher	Wiley
Publisher Date	2014-02-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Spectroscopy Discipline Chemistry Techniques Ecotoxicology Methods Ibuprofen Metabolism Toxicity Photolysis Animals Artemia Chromatography, Liquid Chemistry Radiation Effects Mass Spectrometry Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Medicine

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