A simple thermometric technique for reaction-rate determination of inorganic species, based on the iodide-catalysed cerium(IV)-arsenic(III) reaction

F Grases; R Forteza; J G March; V Cerda

doi:10.1016/0039-9140(85)80040-0

A simple thermometric technique for reaction-rate determination of inorganic species, based on the iodide-catalysed cerium(IV)-arsenic(III) reaction

Talanta. 1985 Feb;32(2):123-6. doi: 10.1016/0039-9140(85)80040-0.

Authors

F Grases¹, R Forteza, J G March, V Cerda

Affiliation

¹ Department of Analytical Chemistry, Faculty of Sciences, University of Palma de Mallorca, Spain.

PMID: 18963807
DOI: 10.1016/0039-9140(85)80040-0

Abstract

A very simple reaction-rate thermometric technique is used for determination of iodide (5-20 ng ml ), based on its catalytic action on the cerium(IV)-arsenic(III) reaction, and for determination of mercury(II) (1.5-10 ng ml ) and silver(I) (2-10 ng ml ), based on their inhibitory effect on this reaction. The reaction is followed by measuring the rate of temperature increase. The method suffers from very few interferences and is applied to determination of iodide in biological and inorganic samples, and Hg(II) and Ag(I) in pharmaceutical products.