Extraction Selectivities of Crown Ethers for Alkali Metal Cations:  Differences between Single-Species and Competitive Solvent Extractions

Extraction Selectivities of Crown Ethers for Alkali Metal Cations:  Differences between Single-Species and Competitive Solvent Extractions

Separation factor values for pairs of alkali metal cations determined in competitive solvent extractions of alkali metal picrates from aqueous solutions into chloroform by a variety of benzo- and cyclohexano-group-containing crown ethers vary significantly from extrapolations based upon the results...

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Veröffentlicht in:Analytical chemistry (Washington) 1999-02, Vol.71 (3), p.672-677
Hauptverfasser: Talanova, Galina G, Elkarim, Nazar S. A, Hanes, Robert E, Hwang, Hong-Sik, Rogers, Robin D, Bartsch, Richard A
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Analytical chemistry
Chemical and thermal methods
Chemistry
Exact sciences and technology
Metals
Solvents
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container_issue 3
container_start_page 672
container_title Analytical chemistry (Washington)
container_volume 71
creator Talanova, Galina G
Elkarim, Nazar S. A
Hanes, Robert E
Hwang, Hong-Sik
Rogers, Robin D
Bartsch, Richard A
description Separation factor values for pairs of alkali metal cations determined in competitive solvent extractions of alkali metal picrates from aqueous solutions into chloroform by a variety of benzo- and cyclohexano-group-containing crown ethers vary significantly from extrapolations based upon the results of single-species extraction experiments. For almost all of the crown ether−alkali metal cation combinations examined, the separation factor values are greater for competitive solvent extraction. In view of the unexpected results for sodium picrate extraction by dibenzo-24-crown-8, the solid-state structure of the isolated complex was determined.
doi_str_mv 10.1021/ac981068o
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subjects Analytical chemistry
Chemical and thermal methods
Chemistry
Exact sciences and technology
Metals
Solvents
title Extraction Selectivities of Crown Ethers for Alkali Metal Cations:  Differences between Single-Species and Competitive Solvent Extractions
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