title: Rapid spectrophotometric determination of trace amounts of palladium in water samples after dispersive liquid-liquid microextraction.
abstract: A simple, rapid, and efficient dispersive liquid-liquid microextraction method, followed by UV-Vis spectrophotometry was developed for the preconcentration and determination of Pd ions in water samples. Pd ions react with α-furildioxime (chelating agent) to form a hydrophobic complex. Various parameters were altered to study and optimize their effects on the extraction efficiency, such as pH, ligand concentration, the type and volume of extraction and dispersive solvents, extraction time, and salt concentration. Under optimized conditions, the method exhibited an enrichment factor (C org/C aq) of 25 and recovery more than 98 % within a very short extraction time. The linearity of the method ranged from 10 to 200 μg L(-1). The limit of detection was 1.1 μg L(-1). The relative standard deviation for the concentration of 100 μg L(-1) of Pd was 2.3 % (n = 10). Finally, the developed method was successfully applied to the extraction and determination of Pd in tap, river, mineral, and sea water samples.
authors.affiliation: Department of Chemistry, Payame Noor Universtiy, PO Box 19395-3697, Tehran, Iran. r_rahnama@ymail.com
authors.forename: Reyhaneh
authors.initials: R
authors.lastname: Rahnama Kozani
authors.forename: Jamshid
authors.initials: J
authors.lastname: Mofid-Nakhaei
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Jamali
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D059627:Liquid Phase Microextraction / Q000379:methods*; D010165:Palladium / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D014874:Water Pollutants, Chemical; D010165:Palladium