Synthesis and characterization of Hg(II) and Cd(II) complexes derived from the novel acenaphthaquinone-4-phenyl thiosemicarbazone and its CPE application

• The acenaphthoquinone-4-phenyl thiosemicarbazone and its bimetallic Hg(II) and Cd(II) complexes have been synthesized.
• The ACPTH utilized in CPE for preconcentration and determination of trace amounts of Hg(II) and Cd(II) in aqueous medium.
• The Hg(II) and Cd(II) preconcentration optimum conditions were 0.1% (w/v) Triton X-114 and 2 × 10−5 M ACPTH at pH 7.
• The proposed method was applied successfully in the determination of Hg(II) and Cd(II) in different water samples.

The new acenaphthaquinone-4-phenyl thiosemicarbazone (APTH) was synthesized. The reaction of Hg(II) and Cd(II) chloride with APTH yields bimetallic complexes, which are characterized by elemental, IR, UV-Vis., 1H-NMR and Mass spectroscopy. The APTH employed as a chelating agent for CPE procedure of trace amounts of mercury and cadmium from aqueous medium. The Hg(II) and Cd(II) is preconcentrated using 0.1% w/v Triton X-114 and 2 × 10−5 M APTH at pH 7. The calibration curve is linear in the ranges 0.25–3 and 0.25–7.5 ng/ml for Cd(II) and Hg(II), respectively. The proposed method was applied successfully in the determination of Hg(II) and Cd(II) in different water samples.