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. 2014 Mar 13;4(4):279–285. doi: 10.1016/j.jpha.2014.03.003

Fig. 2.

Fig. 2

Effect of pH on extraction efficiency. Conditions: sample volume is 50 mL; concentration of CPZ is 100 ng/mL; 10 mg Fe3O4 NPs; 2.5 mg SDS; stirring time is 5 min; elution with 1.0 mL methanol; desorption time is 5 min.