Solid Phase Extraction for Trace Amount Cu (II) by C18 Modified Carbon Nano Tube and Cupferron Ligand in Waste Water Sample and Determination it by Flame Atomic Adsorption

A novel, simple method has been developed for the preconcentration of Cu(II) based on the adsorption of its Schiff’s cupferron complex on a multi walled carbon nanotubes (MWCNTs) onto C18 cartridge .A new technique using a solid phase extraction (SPE) cartridge with modified Schiff’s Cupferron complex on a multi walled carbon nanotubes (MWCNTs) onto C18 cartridge as sorbent was developed for the preconcentration of trace amounts of Cu and was determined by flame atomic absorption spectrometry (FAAS). Cupferron play a key role as chelating reagent on ultrahigh specific surface of multi walled carbon nanotubes (MWCNTs). Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditions the limit of detection (LOD) and limit of quantification (LOQ)were 0.167,0.562 and the proposed method has a good reproducibility 0.81% (RSD %).The enrichment factor was 200 and the percentage of recovery was in the range of 95-100% .The method was successfully applied to the recovery of Cu2+in different type of water samples.