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Potentiometric behavior of ion-selective electrodes to large cationic species modulated by decyl alcohol

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2006-03-01
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Cabrera, Walton J.
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Potentiometric behavior of ion-selective electrodes to large cationic species modulated by decyl alcohol
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  • Cabrera, Walton J.;
  • Kaempfe, Marianne A.;
  • Urzúa Acevedo, Marcela;
  • Ríos, Hernán E.;
Abstract
The effect of 1-decanol on the potentiometric response of three ion-selective electrodes to large cationic species is analyzed. The electrodes were constructed with plasticized PVC membranes. The results suggest that 1-decanol alters the ionic transport through the membrane/water interface to an extent that depends on the strength of the active ion pair. The water solubility of the cation, its molecular weight, and the size of the ion pair seem to be relevant factors in this type of behavior. The potentiometric selectivity coefficients are also dependent on the presence of 1-decanol in the membrane. These results are similar to those already described in ion-selective electrodes with membranes capable of sensing anionic benzene sulfonate-type systems. Thus, the effect of the alcohol appears to be general by affecting mainly the membrane surface polarity.
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URI: https://repositorio.uchile.cl/handle/2250/118766
ISSN: 0021-9797
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JOURNAL OF COLLOID AND INTERFACE SCIENCE Volume: 295 Issue: 1 Pages: 155-158 Published: MAR 1 2006
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