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A fast and sensitive capillary liquid chromatography (cLC) column-switching method with electrospray ionization time-of-flight mass spectrometry (ESI–TOF–MS) detection for the simultaneous determination of dopamine (D), epinephrine (E), norepinephrine (NE) and serotonin (SE) was pursued. A sample volume of 100μl was loaded with a mobile phase containing 0.1% pentafluoropropionic acid (PFPA) as ion-pairing...
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