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Determination of ionic charge by liquid—liquid partition

✍ Scribed by Göte Johansson

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
496 KB
Volume
322
Category
Article
ISSN
1873-3778

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✦ Synopsis

The possibility of determining the net charge of ionic substances by studying their partition between two liquid aqueous phases in equilibrium has been investigated. The partition has been influenced by including three different salts in the systems; viz., sodium sulphate, sodium chloride or sodium perchlorate. In aqueous dextran-polyethylene glycol systems, the difference between the logarithms of partition coefficients, determined for systems containing two different salts, is proportional to the net charge of the ionic molecule present at low concentration. This offers a simple way to determine the net charge of the water-solvated ion by liquid-liquid partition. Simple ions and organic acids and bases as well as dyes and proteins have been investigated. Deviations in the net charges, determined by partition, from the expected values are discussed in the light of the known properties of solvated ions.

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