Fig. 8From: Salting-out assisted liquid–liquid extraction for the determination of ciprofloxacin residues in water samples by high performance liquid chromatography–diode array detectorTypical representative chromatogram of a unspiked and b spiked wastewater. Extraction conditions: 10 mL spiked at 0.1 μg/mL; volume of acetonitrile, 5 mL; amount of salt added, 4 g MgSO4; extraction time, 6 min; pH of the sample solution, 3; centrifugation speed, 4000 rpm; n = 3Back to article page