Joined liquid ion exchange with cloud point extraction methods for separation and determination of Cr (VI)‎, Mn (VII)‎

Abstract EN

Sensitive and selective extraction method used for separation, preconcentration and spectrophotometric determination of Cr(VI) as Cr2O7= and Mn(VII) as MnO4- from HCl media by used Janus green B after formation ion pair association complex, studies the optimum condition for extraction demonstrated 0.1M and 0.05M of HCl suitable for extraction efficiency of Cr(VI) and Mn(VII) respectively , in presence 50µg Mn(VII) or 20µg of Cr(VI).

with 0.8mL 1% TritonX-100 for extraction ion pair association of Cr(VI) as well as 0.5mL for Mn(VII) and 95°C suitable for formation CPL and extraction ion pair complex for both metal ions ,with 15 min.

of heating time for both metal ions.

Then study effect of interferences and electrolyte presence.

This method applied for spectrophotometric determination of Cr(VI) and Mn(VII) in different samples.

The wave length for maximum absorbance of ion pair complex extracted was λmax=560 nm for Mn(VII) and 603nm for Cr(VI) complexes