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The occurrence of several psychoactive drugs in water resources from north-eastern Spain (NE-Spain) has been evaluated. The drugs were analyzed using ultra-performance liquid chromatography coupled to tandem mass spectrometry (UPLC–ESI-MS/MS) after enrichment by solid-phase extraction (SPE). Most of the studied controlled drugs (8 out of 11) were found in both influent and effluent samples from several...
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