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Reference type: Journal
Authors: Yin F, Xu XX
Article Title: Construction and analytical application of a novel ion-selective capacitive sensor for determination of cinchonine.
Publication date: 2004
Journal: Analytical Letters
Volume: 37
Issue: (15)
Page numbers: 3129-3147.
DOI: 10.1081/AL-200040283
Alternative URL: http://www.informaworld.com/10.1081/AL-200040283

Abstract: An ion-selective capacitive sensor was constructed and applied to determine the concentration of cinchonine (CCN). The ion- pair complex of cinchonine-picrolonate was embedded in electropolymerized o-phenylenediamine film on gold electrode surface as a specific sensing element for the analysis of CCN. The logarithm of the capacitance change was linear, with the logarithm of CCN concentration in the range of 2.5 x 10(-7) mol dm(-3) similar to1.25 x 10(-5) mol dm(-3) with a detection limit of 1.0 x 10(-7) mol dm(-3) at pH = 7. The adsorption model of CCN onto ion-selective film appears to be of the Langmuir type, and the adsorption equilibrium constant was estimated at 5.73 x 10(5) dm(3) mol(-1)
Template and target information: cinchonine-picrolonate, cinchonine, CCN

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