Department of Chemistry;
Abdul Wali Khan University Mardan;
23200;
KPK;
Pakistan;
Department of Chemistry;
University of Karachi;
75270;
Karachi;
Pakistan;
Department of Chemistry;
Tarbiat Modares University;
P.O.Box 14115-175;
Tehran;
Iran;
National Center of Excellence in Analytical Chemistry;
University of Sindh;
Jamshoro;
76080;
Sindh;
Pakistan;
School of Pharmacy;
University of Oslo;
Oslo;
Norway;
Hollow; fiber; liquid; phase; microextraction; Electromembrane; extraction; Heavy; metals; Pharmaceuticals; Instrumental; techniques;