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Nusrat Jalbani,Mustafa Soylak 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
A mixed micelle-mediated cloud point extraction procedure was developed for lead. Triton-X114 andbenzyldimethyl hexadecyl-ammonium chloride were used as mixed micellar medium. Lead(II) wasreacted with 4-(2-pyridylazo) resorcinol at pH 6.0 to form hydrophobic chelates. The parametersincluding pH, ligand volume, concentrations of surfactants and centrifugation time were optimized. Theeffect of some common ions was also tested. The limit of detection was 1.15 mg L 1 withpreconcentration factor of 50. The accuracy of method was evaluated by the analysis of certifiedreference materials. The method was successfully applied to determination of levels of lead in watersamples.