An Alternative Method Extraction of Trace Amounts of Cobalt (II) in Water Samples by Modified Nano Nickel Oxide

Metal nanoparticles have been studied for decades, and this is due to the properties that these materials do not have in bulk state. In nanoscale materials, the number of surface atoms is high and hence, have significant surface effects.In this proposed method for pre-concentration and measuring the trace amounts of cobalt (II) ions in aqueous samples, the modified nanostructured nickel oxide was used to improve the preconcentration and extraction procedure. Co2+ ion concentration in aqueous solution was carried out using flame atomic absorption spectrometry.Extraction parameters including,the effect of pH, amount and type of cleanser solvent, extraction time and the effect of other ions and…, were optimized. The enrichment factor of 36, the limit of detection of (LOD) method of 1.768 μg.L-1 and relative standard deviation (RSD %) of 0.75% were obtained, respectively.The methodology was applied for determination of cobalt (II) in natural water samples and satisfactory results were obtaine

Keywords: modified nanonickel oxide, flame atomic absorption spectrometry, Co (II).