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Equilibrium analysis of crown ether complexes by capillary zone electrophoresis

✍ Scribed by Toshio Takayanagi; Ludovick C. Manege; Shoji Motomizu

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 113 KB
Volume: 12
Category: Article
ISSN: 1040-7685
DOI: 10.1002/(sici)1520-667x(2000)12:2<113::aid-mcs8>3.0.co;2-z

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✦ Synopsis

Complex formation reaction of some crown ethers with alkali metal ions was analyzed by measuring the electrophoretic mobility of analytes in capillary zone electrophoresis. For UV-absorbing crown ethers, the crown ethers were used as the analytes, whereas for less UV-absorbing crown ether, alkali metal ions were used as the analytes and detected indirectly. The apparent electrophoretic mobility of the analytes changed with increasing the concentrations of reacting agents in the migrating solution. The complex formation constants were obtained by analyzing the mobility change by a nonlinear least-squared method. Also ion association reaction of the metal complexes with some hydrophobic anions were analyzed.

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