Optimization Cloud Point Extraction Methodology for Separation , Extraction and Spectrophotometric Determination of Zn(II)

Abstract

Extraction Zn⁺² ion from aqueous solution according to CPE method by using laboratory prepared new organic agent2-(4–amino–N–5–methylisoxazol–3-yl)BezenSulfonamideazo–1–Naphthol–Benzen(AIBSNB) as complexing agent at PH=9 and by using Triton X–100 as surfactant , the method need heating to 90C^? for 15 minutes , and then the cloud point layer(CPL)was separated and dissolved in 5ml ethanol to measure the absorbance of complex extracted at ?_max=380nm .This research includes many studies such as thermodynamic , time of heating , interferences , effect of electrolyte salts , Stoichiometry Shows that the complex extracted is[Zn(AIBSNB)]⁺;Cl^- or [Zn(AIBSNB^–(Cl^–)] synergism study shows participation one of TBP or MIBK in structure of complex extracted , this research appear ?=13067 L mol^-1 cm^-1, R.S.D=0.0068 , D.L=1.55×10^-5 and Sandel’s sensitivits=0.0005?g cm^-2.

Key words:Zinc(??) , Cloud Point, extract (CPE), Solvent extraction,MIBK.