
Hollow-fiber liquid-phase microextraction combined with capillary electrophoresis for trace analysis of sulfonamide compounds
Keywords: ED, electrochemical detection; EFs, enrichment factors; DLLME, dispersive liquid–liquid microextraction; HF-LPME, hollow-fiber liquid-phase microextraction; LLE, liquid–liquid extraction; PSS, sodium polystyrene sulfonate; SCE, saturated calomel electrode