Abstrakt

Preconcentration Of Heavy Metal Cations On The Polymeric Sorbent Prior To Their Determination By Atomic Absorption Spectrophotometery

M.A.Farajzadeh, M.R.Fallahi

An efficient polymeric sorbent (poly(ethylenglycoldimethacrylate-comethacrylic acid) (EGDMA-co-MAA)) was prepared, conditioned and used in adsorption of cations as oxinate complexes. The extent linear dynamic ranges and lower limits of detection are the advantages of the proposed methods. The relative standard deviations (RSD%) obtained are less than 8% for all cations. Interferences studies were also carried out using different matrices and found that most of them have no evil effect on the recovery of the analytes. Finally this method was applied to determine heavy metals content of different samples at μg/L level. After optimizing parameters affecting adsorption of target analytes such as sample size, pH, kind of buffer, elution solvent, etc column technique was used to preconcentraton of those compounds followed by their determination using flame atomic absorption spectrophotometry.