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Exchange of Li+, Na+ and K+ ions with a PVC membrane containing valinomycin and KBPh4

✍ Scribed by R.D. Armstrong; M. Todd

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 240 KB
Volume: 31
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(86)87053-0

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✦ Synopsis

Impedance spectra are reported for PVC based membranes containing KBPh, + valinomycin in contact with aqueous solutions of (a) 1O-2 M KCI, (b) lo-' M LiCl and (c) lo-' M NaCl. In the KCl case there is evidence for the rapid exchange of K* between the membrane phase and the aqueous solution. For LiCl the interface is completely blocking at low frequencies indicating no ion exchange of the sort Li+(W) +K+(M)+ Li +(M) + K+(W). For NaCI an intermediate type of behaviour is found.

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