Direct and kinetic fluorimetric methods for determination of micro amounts of Ti(IV), based in its catalytic effect on aerial oxidation of picolinaldehyde nicotinoylhydrazone.
The oxidation of the new reagent picolinaldehyde nicotinoylhydrazone by atmospheric and/or dissolved oxygen is catalysed by traces of Ti(IV), and produces a fluorescent product. Monitoring the fluorescence provides one non-kinetic and three kinetic (initial-rate, fixed-time and fixed-intensity) methods for determination of Ti(IV) at the 60-400 ng/ml level. The variables affecting these methods have been optimized and the tolerance levels for foreign ions determined.
de Castro
M D
MD
Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, Spain.
Valcarcel
M
M