Solid Phase Extraction and Determination of Ultra Trace Amounts of Copper using Activated Carbon Modified by N,N'-Bis(Salicylidene)-1,2-Phenylenediamine

Authors: Gholivand, M. B.; Ahmadi, F.; Rafiee, E.

Source: Separation Science and Technology, Volume 42, Number 4, March 2007 , pp. 897-910(14)

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Abstract:

N,N'-bis(salicylidene)-1,2-phenylenediamine(salophen) modified activated carbon was prepared and used as an effective sorbent for solid phase extraction of Cu(II) ions from aqueous solutions. The salophen modified activated carbon showed a high sorption affinity for Cu(II). In this method a column mode was used for preconcentration of copper(II) in the pH range 3.5-6.5. The retained copper was eluted with 0.1 mol l-1 EDTA and determined by atomic absorption spectrometry. The calibration graph was linear over the copper concentration in the range 0.05-1.5 µg ml -1. Five replicate determination of 0.4 µg ml-1 of copper(II) gave a mean absorbance of 0.385 with a relative standard deviation of 1.35%. The detection limit was 0.0133 µg ml-1. The interference of a large number of anions and cations has been studied and the optimized conditions developed were utilized for determination of copper in various real samples.

Keywords: Solid phase extraction; copper; salophen; modified activated carbon; Schiff base

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01496390601173960

Affiliations: 1: Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran

Publication date: 2007-03-01