Flame atomic absorption spectrometric determination of Cd(II), Zn(II) and Ag(I) in different matrixes after solid phase extraction on sodium dodecyl sulfate (SDS)-coated alumina as their 2,3 Di Hydro 2,3 para tolyl Qinazoline (1 H)- 4 one (DPTQO)

Abstract

A sensitive and selective solid phase extraction procedure for the determination of traces of Cd(II),<br />Zn(II) and Ag(I) ions has been developed. An alumina-sodium dodecyl sulfate (SDS) coated on with<br />2,3 Di Hydro 2,3 para tolyl Qinazoline (1 H)- 4 one (DPTQO). The influences of the analytical<br />parameters including pH and sample volume were investigated. Common coexisting ions did not<br />interfere on the separation and determination of analytes under study. The adsorbed analytes were<br />desorbed by using 6mL of 4 mol L�1 nitric acid. The responses are linear 0.02–0.85 �g mL-1 for Cd2+<br />ion 0.01–0.90 �g mL-1 for Zn2+ and 0.02–0.92 �g mL-1for Ag+ detection limit for Cd(II), Zn(II) and<br />Ag(I) ions were found to be 1.4, 1.3 and1.12 (ng mL-1), respectively. It was found that the recovery<br />for Cd2+, Zn2+and Ag+ ions were 97.7, 98.2 and 98.0 with RSD of 1.9, 1.8 and 1.7. It was also<br />observed that recovery for repeated recovery on the same solid phase not varies more than 3%. The<br />presented procedure was successfully applied for determination of analytes in radiology wastewater,<br />amalgam, natural water and blood samples.