Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop Followed by Gas Chromatography-Electron Capture Detector for Determination of Some Pesticides in Water Samples
Figure 3
The effect of extraction solvent (1-undecanol) volume on the preconcentration factor of analytes. Extraction conditions: water sample volume, 5.0 mL; disperser solvent (acetone) volume, 1.0 mL; extraction solvent (1-undecanol) volumes, 15.0, 20.0, 25.0, 30.0, 35, and 40 μL; concentration of analytes, 100 μg L−1.