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Partition of amines and lysine oligomers between organic solvent and water under a controlled interfacial potential difference.
- Source :
-
Journal of Electroanalytical Chemistry . Jul2018, Vol. 820, p97-102. 6p. - Publication Year :
- 2018
-
Abstract
- We examined the partition of two amines, procaine and metoprolol, in ionic and charge-neutral forms between organic solvent (O) 1,2-dichloroethane and water (W) phases, each of which contained a common ion, [(C n F 2n+1 SO 2 ) 2 N] − , as tetrabutylammonium and Li + salts, respectively, to control the potential difference at the O|W interface, Δ O W ϕ. The interfacial system would be useful in the study of the partitioning of ionic species, which depends on Δ O W ϕ. With different pH levels, the dependence of the distribution ratio on Δ O W ϕ satisfied the prediction from the theoretical equation, giving the formal potentials for the transfer of the ionic forms at the O|W interface. We also examined the partition of nourseothricin, a mixture of streptothricin antibiotics with different sizes of lysine oligomers. They would exist as di-, tri-, tetra- and pentavalent cations in fully protonated forms. The distribution ratio for each ionic species could be determined simultaneously using an HPLC technique. The dependence of the distribution ratio on Δ O W ϕ for each species also satisfied the prediction, giving their formal potentials. Therefore, the present interfacial system can be applied when both ionic and charge-neutral species are partitioned and when the sample is of low purity or is a mixture. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AMINES
*OLIGOMERS
*LYSINE
*ORGANIC solvents
*WATER
*METOPROLOL
*VOLTAGE
Subjects
Details
- Language :
- English
- ISSN :
- 15726657
- Volume :
- 820
- Database :
- Academic Search Index
- Journal :
- Journal of Electroanalytical Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 129734853
- Full Text :
- https://doi.org/10.1016/j.jelechem.2018.05.001