title: Modification of chloromethylated polystyrene with 2-mercabtobenzothiazole for application as a new sorbent for preconcentration and determination of Ag+ from different matrices.
abstract: Chloromethylated polystyrene polymer (CMSP) modified with 2-mercabtobenzothiazole (MBT) has been developed for the selective separation and/or preconcentration of silver. The modified polymer (CMS-MBT) was characterized by elemental analysis and IR spectra. Batch and column modes were applied. The newly designed polymer quantitatively sorbed Ag(+) at pH 2 when the flow rate is 5 ml min(-1). The maximum sorption capacity was 0.493 mmol g(-1) while the preconcentration factor was 250 for Ag(+). The detection limit was 8 ng ml(-1). The desorption was effective with 5 ml of 2 mol l(-1) HNO(3) prior to detection using AAS. The modified polymer was highly ion-selective in nature even in the presence of large concentrations of electrolytes or organic media, with a preconcentrating ability for Ag(+). The utility of the modified polymer to synthetic and drugs samples showed RSD values of <3% reflecting its accuracy and reproducibility.
authors.affiliation: Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
authors.forename: A M
authors.initials: AM
authors.lastname: El-Menshawy
authors.forename: I M
authors.initials: IM
authors.lastname: Kenawy
authors.forename: A A
authors.initials: AA
authors.lastname: El-Asmy
mesh_terms: D000327:Adsorption; D052160:Benzothiazoles / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D008670:Metals / Q000032:analysis; D011137:Polystyrenes / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D052160:Benzothiazoles; D007202:Indicators and Reagents; D008670:Metals; D011137:Polystyrenes; D012834:Silver; C005563:captax