Hollow Fibre-Supported Liquid Membrane for the Determination of Sulfonamide Residues in Egg Samples

Figure 2

Evaluation of the organic solvent. Extraction conditions: 300 μg·kg⁻¹ SAs mixture spiked in blank egg samples; hollow fibre length (4 cm); 5 mL of aqueous sample solution (pH 4); 6 μL of aqueous acceptor phase (pH 12); HA, 1-octanol, DHE, TEA, and a mixture of TEA and 1-octanol (50 : 50; v/v) as an SLM; stirring rate: 400 rpm; extraction time: 60 min; and n = 5.