Selective cation-exchange separation of lead on tin(II) hexacyanoferrate(III) gel

Ajay K. Jain; Raj Pal Singh; Chand Bala

doi:10.1039/AN9830800880

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Analyst

Issue 1288, 1983

The home of premier fundamental discoveries, inventions and applications in the analytical and bioanalytical sciences

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Selective cation-exchange separation of lead on tin(II) hexacyanoferrate(III) gel

Ajay K. Jain, Raj Pal Singh and Chand Bala

Analyst, 1983,108, 880-885

DOI: 10.1039/AN9830800880

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Abstract
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Tin(II) hexacyanoferrate(III) gel, prepared by adding tin(II) chloride to potassium hexacyanoferrate(III) solution and heating at 80 °C, has been found to be stable in acids and salt solutions. Distribution coefficients, determined for various metal ions, show that the exchanger has a high affinity for lead. Binary separations of lead from a number of other metal ions at different concentrations were achieved on the column of the exchanger and a ternary separation of Pb²⁺- Cu²⁺- Zn²⁺ was also carried out.

Abstract from Analytical Abstracts 1984

The preparation of the cited gel is described; the product is stable in aq. mineral acid or salt (e.g., KCl or NH4NO3) media. Distribution coeff. have been determined for 31 elements by shaking 0.1 g of exchanger with 10 ml of metal ion soln. (2mM) for 48 h. There was high affinity for univalent cations (Rb+, Cs+ and Ag+), but only for Pb2+ amongst bivalent cations. Up to 1mM-Pb2+ was completely adsorbed from soln. in static studies. Dynamic separations of Pb2+ from a variety of binary mixtures were achieved; the adsorbed Pb2+ were eluted with 1M-HNO3. Lead could be separated from Cu and Zn, but not from Ag.

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Selective cation-exchange separation of lead on tin(II) hexacyanoferrate(III) gel

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