title: Determination of anti-malaria agent chloroquine using single drop liquid-liquid-liquid microextraction.
abstract: A simple, sensitive, and inexpensive single drop liquid-liquid-liquid microextraction combined with isocratic RP-HPLC and UV detection was developed for the determination of anti-malaria drug, chloroquine. The target compound was extracted from alkaline aqueous sample solution (adjusted to 0.5 mol/L sodium hydroxide) through a thin layer of organic solvent membrane and back-extracted to an acidic acceptor drop (adjusted to 0.02 mol/L phosphoric acid) suspended on the tip of a 25 microL HPLC syringe in the organic layer. This syringe was also used for direct injection after extraction. The linear range was 1-200 microg/L. The LOD and LOQ were 0.3 and 1.0 microg/L, respectively. Intra-and inter-day precisions were less than 2.0 and 2.3%, respectively. The real samples were successfully analyzed using the proposed method. The recoveries of spiked samples were more than 94.6%.
authors.affiliation: Department of Chemistry, Faculty of Science, Ilam University, Ilam, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Daneshfar
authors.forename: Tahere
authors.initials: T
authors.lastname: Khezeli
authors.forename: Mohamad H
authors.initials: MH
authors.lastname: Manafi
mesh_terms: D000962:Antimalarials / Q000032:analysis* / Q000737:chemistry*; D002738:Chloroquine / Q000032:analysis* / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D006863:Hydrogen-Ion Concentration; D012997:Solvents; D013997:Time Factors
chemical_list: D000962:Antimalarials; D012997:Solvents; D002738:Chloroquine