Use of cationic micellar mobile phases in normal-phase TLC for enhanced selectivity in the separation of transition metal ions: simultaneous separation of mixtures of zinc, nickel, mercury, and cadmium or manganese cations

• Autorzy: Mohammad A. , Agrawal V.
• Języki publikacji: EN

Abstrakty

EN

Thin-layer chromatography of five transition metal cations has been performed on silica gel layers with micellar solutions of N,N-cetyltrimethyl-ammonium bromide (CTAB) as mobile phases. The effect of surfactant concentrations below and above the critical micellar concentration (CMC) on the retention behaviour of metal ions was examined. The effect of organic and inorganic additives on the mobility and separation efficiency of the metal ions was also assessed. The best TLC system for rapid separation of mixtures of Zn2+, Ni2+, Hg2+, and Cd2+ or Mn2+ was plain silica as stationary phase and 50 mM aqueous CTAB as mobile phase. CTAB buffered at moderate pH (e.g. pH 3.4) was found suitable for separating mixtures of these metal ions. Semiquantitative determination of Ni2+ by spot-area measurement was also attempted. The proposed method was used for separation and identification of zinc, nickel, mercury, and manganese or cadmium from drag-out nickel-plating solution and from a sludge sample containing their hydroxides.

• Wydawca: University of Silesia in Katowice ; Akademiai Kiado
• Czasopismo: Acta Chromatographica
• Rocznik: 2002
• Tom: No. 12
• Strony: 177--188
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Mohammad A.

• Analytical Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India

autor

Agrawal V.

• Analytical Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India

Bibliografia

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