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Four new complexes were prepared by the metathetic reaction of trace heavy metals like Cd, Zn, Cu and Hg with two different dithioligands of the formula ML 2 [ M= Cd, Zn, Cu and Hg and L= potassium-1,1-dicyano-2,2-ethylenedithiolate and potassium N-4-fluorobenzyl, N butyldithiocarbamate ] and characterized by elemental analysis, IR, UV-visible, 1H,13C NMR and AAS. Atomic Absorption Spectrophotometric measurements revealed that the Nsubstituted dithiocarbamate ligand are more effective. Removal efficiency of heavy metals than carbon substituted dithiocarbamate ligand. Molar ratio studies show that the complexes have the formula ML 2 . Solvent extraction measurement indicates that after the extraction of heavy metal in water phase and their dithiocarbamate complexes are completely dissolved in organic phase and are totally separated from aqueous solution.

Comparative Evaluation of Trace Heavy Metal Ions in Water Sample using Complexes of Dithioligands by Flame Atomic Absorption Spectrometry