title: Solid phase extraction of rare earth elements in seawater and estuarine water with 4-(2-thiazolylazo) resorcinol immobilized Chromosorb 106 for determination by inductively coupled plasma mass spectrometry.
abstract: A solid phase preconcentration method has been developed using new chelating resin prepared by immobilization of 4-(2-thiazolylazo) resorcinol (TAR) on Chromosorb 106. The method was optimized for determination of rare earth elements (REEs) in seawater and estuarine water samples by inductively coupled plasma mass spectrometry (ICP-MS). The effects of various experimental parameters, such as load pH, eluent concentration, sample and eluent flow rates were examined to find the optimum operating conditions. The REEs were quantitatively retained from saline solutions on a minicolumn Chromosorb 106-TAR resin at pH 5.0 and then eluted with 1.0 mL of 1% (v/v) HNO3. The resin possesses large sorption capacity for REEs ranging from 81.1 µmol g-1for Lu and 108 µmol g-1for Nd. Detection limits (3s) varied between 0.06 ng L-1for Pr to 0.31 for Ce for preconcentration of 5.0 mL blank solutions (pH 5.0). The relative standard deviation for triplicate measurements was less than 5% at 0.1 µg L-1level. The method was validated by analysis Nearshore seawater certified reference material (CASS-4). The elemental results were comparable with the values reported in literature. The method was verified by analysis of spiked and unspiked coastal seawater and estuarine water samples.
authors.affiliation: Department of Chemistry and Biochemistry, Jackson State University, Jackson, USA.
authors.forename: Fahmida
authors.initials: F
authors.lastname: Zereen
authors.forename: Vedat
authors.initials: V
authors.lastname: Yilmaz
authors.forename: Zikri
authors.initials: Z
authors.lastname: Arslan
keywords: 4-(2-thiazolylazo) resorcinol (TAR); Chromosorb 106; ICP-MS; Rare earth elements; seawater; solid phase preconcentration