title: Ionic liquid-based dispersive liquid-liquid microextraction and enhanced spectrophotometric determination of molybdenum (VI) in water and plant leaves samples by FO-LADS.
abstract: A new simple and rapid ionic liquid-based dispersive liquid-liquid microextraction (IL-DLLME) has been applied to preconcentrate trace levels of molybdenum (VI) as a prior step to its enhanced determination by fiber optic-linear array detection spectrophotometry (FO-LADS). In this method, a small amount of [Hmim][Tf(2)N] (1-hexyl-3-methylimmidazolium bis (trifluormethylsulfonyl) imid) as an extraction solvent was applied to extract molybdenum - pyrogallol red complex, which was formed in an aqueous solution in the presence of N-cetyl-N-N-N-trimethyl ammonium chloride as a sensitizing agent. Under optimum conditions, enhancement factor, detection limit and relative standard deviation (n=5, for 30 μg L(-1) of molybdenum (VI)) in 10 mL water sample were 72.6, 1.43 μg L(-1) and 2.8%, respectively.
authors.affiliation: Department of Analytical Chemistry, University College of Science, University of Tehran, Tehran, Iran.
authors.forename: Maysam
authors.initials: M
authors.lastname: Gharehbaghi
authors.forename: Farzaneh
authors.initials: F
authors.lastname: Shemirani
mesh_terms: D000085:Acetates; D019342:Acetic Acid; D005336:Fiber Optic Technology; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D007093:Imidazoles / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D008982:Molybdenum / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D014867:Water / Q000737:chemistry*
chemical_list: D000085:Acetates; D007093:Imidazoles; D052578:Ionic Liquids; D008024:Ligands; D014867:Water; D008982:Molybdenum; D019342:Acetic Acid