Determinación de selénio por su efecto catalítico en la reducción del azul de toluidina por el ion sulfuro

Authors

  • T. Pérez Ruiz
  • C. Martínez Lozano
  • M. Hernández Lozano

Abstract

The reduction of toluidine blue by sulphide is catalysed by small amounts of selenium. As a consequence a new kinetic method for the selenium determination is developed. The experimental conditions have been optimized and the variable time method appears to be the most suitable for the determination of selenium. The new method is very sensitive (10 ng/ml) showing good accuracy. Most of the interferences from diverse metallic ions are eliminated by the addition of an excess of Ba(II)-EDTA.

Published

02-07-2021

Issue

Section

Artículos