Extraction and Determination of Heavy Metals Using Silver Coated Magnetic Nanoparticles and Flame Atomic Absorption Spectrometry

Journal of Applied Chemical Research

مقاله 3، دوره 13، شماره 2، مرداد 2019، صفحه 36-50   

نوع مقاله: Research Paper

نویسندگان

Ehsan Ghasemi؛ Majid Ramezani^*

Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran

چکیده

A rapid, simple and sensitive magnetic solid phase extraction (MSPE) method was developed for the pre-concentration and determination of copper and cadmium ions. In this study, modified Fe3O4@Ag nanoparticles were synthesized and then ligand 2-isonicotinoyl hydrazine carbodithiolate (ITHCDT) was bonded to silver due to the formation of covalent bond of S-Ag. In this method, copper and cadmium ions were absorbed on the sorbent and then eluted by 1 mL of HCl (2 mol L-1) and measured by FAAS. Different effective parameters such as pH, eluent type and volume, amount of sorbent, sorption capacity, contact time were investigated and optimized.
Relative standard deviation (RSD, n=7) under optimum condition for Cd (II) and Cu(II) was 1.23% and 1.67%, respectively. Limit of detection (LOD) of the method for cadmium and copper was 0.87 and 0.51 μg L-1, respectively. The proposed method was successfully applied for the determination of trace amounts of copper and cadmium ions in water samples.

کلیدواژه‌ها

Modified magnetic nanoparticles؛ Cadmium؛ Copper؛ Flame atomic absorption spectrometry؛ Water samples