Electrooxidation of iodide in the presence of 4-hydroxycoumarin: application to a simple coulometric titration of 4-hydroxycoumarin.
The electrochemical oxidation of iodide ion in the presence of 4-hydroxycoumarin (1) was studied using cyclic voltammetry and controlled-potential coulometry. The result indicates that the resulting iodine takes part in a halogenation reaction and reacts with 4-hydroxycoumarin (1). According to the obtained results, a new and simple coulometric titration method with potentiometric end-point detection for the determination of 4-hydroxycoumarin (1) is presented. In the presented method, 2-200 micromol of 4-hydroxycoumarin (1) was successfully determined.
Nematollahi
Davood
D
Department of Chemistry, Faculty of Science, University of Bu-Ali-Sina, Hamadan, Iran. nemat@basu.ac.ir
Hamzehloei
Ali
A
Hesari
Mehdi
M
Rahimi
Javad
J
D015110:4-Hydroxycoumarins / Q000737:chemistry*; D004563:Electrochemistry; D007202:Indicators and Reagents; D007454:Iodides / Q000737:chemistry*; D007455:Iodine / Q000032:analysis; D010084:Oxidation-Reduction; D011199:Potentiometry
D015110:4-Hydroxycoumarins; D007202:Indicators and Reagents; D007454:Iodides; D007455:Iodine; C068805:4-hydroxycoumarin