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In this paper we present a method based on ultra-high performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) combined with a solid-phase extraction to determine nine glucocorticoids in river waters and sewage. In addition, we attempt the chromatographic separation of two glucocorticoid epimers (betamethasone and dexamethasone) which until now had not been determined simultaneously...
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