چكيده لاتين :
A simple and selective method for rapid extraction and determination of trace amounts of iron(III) using octadecyl-bonded
silica membrane disks modified with 2-mercaptopyridine-1-oxide and flame atomic absorption spectroscopy is presented. The
factors influencing extraction efficiency were evaluated, including the nature of the counter anion, pH of the sample solution,
amount of ligand, flow rate of the sample and type of stripping solution. The maximum capacity of the membrane disk, modified
by 10 mg of the ligand, was found to be 926 ± 6 ىg of iron(III). The breakthrough volume was greater than 2500 ml. Iron(III) was
completely recovered (>99%) from water with a preconcentration factor of more than 166. The limit of detection of the proposed
method was 0.63 ng ml-1. The various cationic interferences had no effect on the recovery of iron(III) from the binary mixtures.
The proposed method was applied to the determination of iron(III) from three different water samples.
