Title of article :
Determination of trace amounts of cadmium, copper and nickel in environmental water and food samples using GO/MgO nanocomposite as a new sorbent
Author/Authors :
Khayatian, Gholamreza Department of Chemistry - Faculty of Science - University of Kurdistan, Sanandaj , Jodan, Masomeh Department of Chemistry - Faculty of Science - University of Kurdistan, Sanandaj , Hassanpoor, Shahed Department of Chemistry - Faculty of Science - University of Kurdistan, Sanandaj , Mohebbi, Sajjad Department of Chemistry - Faculty of Science - University of Kurdistan, Sanandaj
Abstract :
A solid phase extraction method based on graphene oxide (GO) modified with magnesium oxide (MgO) nanoparticles was developed for the preconcentration and determination of trace amounts of cadmium, copper and nickel ions. The adsorbed analytes were eluted by 4.0 mL of 0.1 M (EDTA) and injected to flame atomic absorption spectrometer. The factors influencing the complex formation and extraction of these heavy metals were optimized. Studies on potential interference by various anions and cations showed the method to be highly selective. The preconcentration factor was about 11 with relative standard deviation of <4.0 for 8 replication determination. The detection limits for the Cd, Cu, Ni were found to be 0.5, 3.4 and 25 µg L−1, respectively. The method was successfully applied for the determination of cadmium, copper and nickel in tap water, well water, sea water, rice and macaroni samples with spike recoveries ranging 93–105 %.
Keywords :
Heavy metals , Solid phase extraction , Nanocomposite , Flame atomic absorption spectrometry
Journal title :
Astroparticle Physics
