Extraction and spectroscopic determination of Ni (ll) as a chelation complexes using new azo reagents

A highly sensitive approach for separating and determining the micro amount of nickel (II) was conducted. It has been achieved after the formation of chelation complexes with 4-((4-hydroxyquinolin-3-yl) diazenyl) benzenesulfonamide (HQDBS) and 3-((1H-indol-5-yl)diazenyl)quinolin-4-ol (IDQ) as complexing agents (which are examined by using UV-Vis., FT-IR, and 1HNMR spectrum), including joint cloud point extraction with liquid ion exchange methods in the presence of the nonionic surfactant Triton X–100. The study is based on the wavelength values of maximum absorbance, λ max = 480 and 484 nm, respectively. The study optimized the extraction conditions, including the reagent concentration, temperature, heating duration, and surfactant volume. The concentration of reagents for achieving higher extraction efficiency is 1×10-3 M in the presence of 100 µg Ni (II)/mL of aqueous solution. The solutions should be heated at 80°C and 90°C HQDBS and IDQ respectively, for 15 minutes. The optimal volume of surfactants is 0.8 mL of Triton X-100 with HQDBS and 0.5 mL with IDQ. The study also includes an analysis of the impact of electrolytes and interferences and the spectrophotometric identification of Ni (II) in various samples.