5-Chloro-2-hydroxyaniline-copper(II) coprecipitation system for preconcentration and separation of lead(II) and chromium(III) at trace levels.
A separation-preconcentration procedure based on the coprecipitation of lead(II) and chromium(III) ions with copper(II)-5-chloro-2-hydroxyaniline system has been developed. Effects of pH, sample volume and interferences on the recovery of the metal ions were investigated. The detection limits corresponding to three times the standard deviation of the blank were found to be 2.72 microg L(-1) for lead and 1.20 microg L(-1) for chromium. The preconcentration factor is 50. The effectiveness of the present method was assessed by determining analyte metals in GBW 07309 stream sediment and NIST SRM 1633b coal fly ash certified reference materials. The method was successfully applied to the determination of trace lead and chromium in environmental samples.
Tuzen
Mustafa
M
Gaziosmanpasa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey.
Citak
Demirhan
D
Soylak
Mustafa
M
D011232:Chemical Precipitation; D002733:Chlorophenols / Q000737:chemistry*; D002857:Chromium / Q000302:isolation & purification*; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000302:isolation & purification*; D014867:Water / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification
D002733:Chlorophenols; D014874:Water Pollutants, Chemical; D014867:Water; D002857:Chromium; D007854:Lead; C027296:2-amino-4-chlorophenol