Cloud Point Extraction Method for Separation, Extraction and Spectrophotometric Determination of Zn(II) and Ni(II) as Chloro Anion Complex by use of Crystal Violet

Jihan R. Muslim


Sensitive extraction method is used for separation preconcentration coupled with spectrophotometric
determination of Zinc(II) and Nickel(II) as chloro anions from acidic HCl media by using crystal violet after
formation ion pair association complex after studied the optimum condition for extraction demonstrated 1.5M
HCl for Zn+2and 1M HCl for Ni2+, with 50 μg Zn2+ and Ni2+ , 0.7mL 1% TritonX-100 for extraction ion pair
association of Zn2+ as well as 0.9mL with Ni2+ and 800C suitable for formation CPL and extraction ion pair
complex for both metal ions ,with 10 minutes of heating in thermostatic water bath for Zn2+ and 15 minutes for
Ni2+ then study involved effect of interferences and electrolyte with spectrophotometric determination in
different samples. The wave length for maximum absorbance of ion pair complex extracted was λmax=590nm for
Zn2+and 595nm for Ni2+complexes.

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