Hollow-Fibre-Supported Dispersive Liquid-Liquid Microextraction for Determination of Atrazine and Triclosan in Aqueous Samples

Figure 6

The extraction-time profile for the two analytes with and without stirring. The extraction-time profile of triclosan under the optimised extraction conditions: volume, 1 mL of 5 µg/mL atrazine and triclosan aqueous sample to which 15 mg NaCl was added (15% w/v); 25 µL of a 1 : 4 (v/v) chlorobenzene: ethyl acetate mixture; toluene as the acceptor solvent; stirring rate 600 rpm and a pH of 7.