Zincon polymer as a new modifier for selective separation and determination of copper and zinc from synthetic, water and drug samples

Adel M El-Menshawy

doi:10.17485/ijst/2009/v2i2.15

Abstract

Chloromethyl polystyrene polymer (CMPSpolymer) has been modified with 2-carboxy-2-hydroxy5-sulfoformazyl benzene (Zincon) to be used as a new reagent for preconcentration of Cu(II) and Zn(II) ions. The modified polymer (Z–polymer) has been characterized by elemental analysis and IR spectra. Batch and column modes were operated. The newly designed polymer sorbs Cu(II) and Zn(II) quantitatively at pH 7 with flow rate of 5 ml min–1. The maximum sorption capacities for Cu(II) and Zn(II) ions were 1.26 and 1.04 mmol g–1. The preconcentration factors were 250 and 200 for Cu(II) and Zn(II) ions. The limit of detection was 4 and 5 ng ml–1 for Cu(II) and Zn(II) ions. The desorption was effective by using 5 ml of 0.1 mol l –1 HCl or HNO3 prior to detection using AAS. The modified polymer was highly ion-selective even in the presence of large concentration of electrolytes or organic media, with a preconcentration ability for Cu(II) and Zn(II) ions. The modified polymer was tested on its utility with synthetic, natural water and drug samples, showing RSD value of < 3% which reflects good accuracy and reproducibility. Keywords: Chloromethyl polystyrene polymer; preconcentration of Cu(II) and Zn(II) ions.

Highlights

Co., Germany); 2% DVB; specific surface area (BET) is atomic absorption spectrometry (AAS) 66 m2 g.1 and 46 meq g.1 resin was used. 2-Carboxy-2-(Narin et al, 2000; Soylak et al, 2005) and inductively hydroxy-5-sulfo-formazyl benzene, cetyltrimethyl coupled plasma atomic emission spectrometry (ICP- ammonium bromide (CTAB) and the metal saltsAES) (Gjerde et al, 1993; Jamali et al, 2007; Xu et al, (Aldrich) were used
The traditional separation and each titration with buffer solutions produced by preconcentration methods for metal ions include liquid– FISHER (New Jersy, USA)
The mixture was shaken for 30 min with a mechanical stirrer, filtered, washed with bidistilled water; the sorbed metal ion was eluted with 5 ml of a suitable concentration of HCl

Summary

Introduction

Co., Germany); 2% DVB; specific surface area (BET) is atomic absorption spectrometry (AAS) 66 m2 g.1 and 46 meq g.1 resin was used. 2-Carboxy-2-(Narin et al, 2000; Soylak et al, 2005) and inductively hydroxy-5-sulfo-formazyl benzene, cetyltrimethyl coupled plasma atomic emission spectrometry (ICP- ammonium bromide (CTAB) and the metal saltsAES) (Gjerde et al, 1993; Jamali et al, 2007; Xu et al, (Aldrich) were used. The mixture was shaken for 30 min with a mechanical stirrer, filtered, washed with bidistilled water; the sorbed metal ion was eluted with 5 ml of a suitable concentration of HCl. The resulting solution was adjusted to 100 ml and determined using AAS. The column was washed with 100 ml of bidistilled water to remove excess metal ions from the polymer bed.

Results

Conclusion