Modified Sodium Dodecyl Sulfate Coated γ-Alumina Nanoparticles with (e)n -(2-Hydroxybenzylidene)Isonicotinohydrazide as New Sorbent for Copper Determination in Real Samples

In this study, a novel and efficient solid phase extraction method based on the use of γ-alumina (γ-Al2O3) nanoparticles coated with sodium dodecyl sulfate and modified with (E)N -(2-hydroxy benzylidene) isonicotinohydrazide (H2L) as a new adsorbent was developed for separation and determination of trace amounts of copper(II) prior to flame atomic absorption spectrometry (FAAS). The analyte ions were adsorbed quantitatively on adsorbent due to their complexation with (H2L). The separation procedure was studied with regard to experimental parameters such as pH, amount of sodium dodecyl sulfate , ligand’s concentration, contact time, type and volume of eluent and stirring rate. The effects of interfering ions on the extraction procedure were also investigated. Under the optimum experimental conditions, the extraction efficiency was 98, 97 and 95.5 with relative standard deviation lower than 5% for Shurabil Lake, the collected water behind the barrier and Baligluchai River, respectively. Noticeably, the method has been successfully applied for the extraction and determination of copper content in some real samples.