Solid phase extraction of Hg (П) in water samples by nano-Fe3O4 encapsulated-dioctylphthalate and linked- diethylenetriamine
Subject Areas : International Journal of Bio-Inorganic Hybrid Nanomaterials
Keywords: Preconcentration, SPE, CVAAS, Dioctyl phthalate (DOP) Encapsulate nano-Fe3O4, Hg2+, Nano-Fe3O4-DOP,
Abstract :
A cold vapor atomic absorption spectrophotometric (CVAAS) method for the determinationof trace Hg(II) after adsorption of magnetic nano- Fe3O4 -DOP- DTA has been developed. The as magneticnano- Fe3O4-DOP-DTA have a good capacity to retain Hg2+, but the raw and purified as magnetic nano-Fe3O4-DOP- DTA are found not to adsorb Hg2+ ions. This was treated with diethylenetriamine (DTA) inanother solvent-free procedure for the formation of a novel nano-Fe3O4-DOP-DTA. Cold vapor atomicabsorption spectrometry (CVAAS) was utilized for determination of Hg2+. The effects of solution pHsolution, elution conditions on pre-concentration of trace Hg2+ were studied and the effect of interferingions was also investigated. Preconcentration factor was 200 .The method was successfully appliedto the recovery of Hg2+ in different type of water samples. Graphene oxide and its derivate such asmagnetic nano- Fe3O4 -DOP- DTA in this study is full of potential to use as an excellent adsorbent in theextraction method like solid phase extraction (SPE) and solid phase micro extraction (SPME).