DERIVATIVE DYNAMIC-RESPONSE OF ION-SELECTIVE ELECTRODES - APPLICATIONTO THE PRECIPITATE-BASED IODIDE-SELECTIVE ELECTRODE IN THE PRESENCE OF INTERFERING IONS

Citation
C. Sanchezpedreno et al., DERIVATIVE DYNAMIC-RESPONSE OF ION-SELECTIVE ELECTRODES - APPLICATIONTO THE PRECIPITATE-BASED IODIDE-SELECTIVE ELECTRODE IN THE PRESENCE OF INTERFERING IONS, Analytica chimica acta, 315(1-2), 1995, pp. 63-67
Citations number
16
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032670
Volume
315
Issue
1-2
Year of publication
1995
Pages
63 - 67
Database
ISI
SICI code
0003-2670(1995)315:1-2<63:DDOIE->2.0.ZU;2-V
Abstract
The concept of the derivative dynamic response (dE/dt) of ion-selectiv e electrodes is introduced to study the response of a precipitate-base d iodide-selective electrode in the presence of interfering ion, using a now injection system and a flow-through cell. A type of concentrati on perturbation is assayed in which the primary ion is completely remo ved while the interfering ion is introduced. The effects of interferin g ion concentration and flow rate on the derivative dynamic signals ar e studied. A new well-defined peak appears in the presence of bromide interfering ion. The peak height increases with bromide concentrations in the range of 10(-5) to 10(-2) M. In the case of chloride interferi ng ion the new peak is only appreciable at greater than or equal to 10 (-2) M.