Modified activated carbon by N, N’-Diacetyl-4-Bromo-2, 6-DI (Aminomethyl)‎ phenol as a tool for the solid phase extraction in heavy metals analysis

Abstract EN

A sensitive, simple and relatively fast method has been developed to selectively separate and concentrate trace amounts of heavy metal ions from aqueous samples for measurement by flame atomic absorption spectrometry.

The method is based on the adsorption of Ni, Cu, Zn, and Cd on N, N’-diacetyl-4-bromo-2, 6-di (aminomethyl) phenol (DBDP) loaded on activated carbon.

The metals content on the complexes are eluted using 6 ml 4 M HNO3.

The detection limits by three sigma for analyte ions were 2.5 μg mL-1, 2.4 μg mL-1, 1.9 μg mL-1, and 2.1 μg mL-1using DBDP for Ni, Cu, Zn, and Cd, respectively.

The presented procedure was applied to the determination of analytes in vegetable samples and water samples with successful results (recoveries greater than 97 %, R.S.D.s lower than 2.2 % for n = 3).