title: Development of a selective and sensitive flotation method for determination of trace amounts of cobalt, nickel, copper and iron in environmental samples.
abstract: A simple, selective and rapid flotation method for the separation-preconcentration of trace amounts of cobalt, nickel, iron and copper ions using phenyl 2-pyridyl ketone oxime (PPKO) has been developed prior to their flame atomic absorption spectrometric determinations. The influence of pH, amount of PPKO as collector, type and amount of eluting agent, type and amount of surfactant as floating agent and ionic strength was evaluated on the recoveries of analytes. The influences of the concomitant ions on the recoveries of the analyte ions were also examined. The enrichment factor was 93. The detection limits based on 3 sigma for Cu, Ni, Co and Fe were 0.7, 0.7, 0.8, and 0.7 ng mL(-1), respectively. The method has been successfully applied for determination of trace amounts of ions in various real samples.
authors.affiliation: Chemistry and Chemical Engineering Department, Yasouj University, Yasouj 75914-353, Iran.
authors.forename: H
authors.initials: H
authors.lastname: Karimi
authors.forename: M
authors.initials: M
authors.lastname: Ghaedi
authors.forename: A
authors.initials: A
authors.lastname: Shokrollahi
authors.forename: H R
authors.initials: HR
authors.lastname: Rajabi
authors.forename: M
authors.initials: M
authors.lastname: Soylak
authors.forename: B
authors.initials: B
authors.lastname: Karami
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis*; D009566:Nitrates / Q000737:chemistry; D010091:Oximes / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007477:Ions; D019216:Metals, Heavy; D009566:Nitrates; D010091:Oximes; D017680:Potassium Compounds; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C528188:phenyl 2-pyridyl ketone oxime; C023844:potassium nitrate