Application of a modified catalytic effect: determination of nanogram amounts of zinc in milk samples using a kinetic-fluorimetric method

1 January 1983

journal article
Published by Royal Society of Chemistry (RSC) in The Analyst

Vol. 108 (1282) , 85-91
https://doi.org/10.1039/an9830800085

Abstract

An indirect kinetic fluorimetric method for the determination of trace amounts of zinc(II) is described, which is based on its activator effect on the oxidation of 2-hydroxybenzaldehyde thiosemicarbazone by hydrogen peroxide catalysed by managanese(II). The reaction is followed by measuring the rate of appearance of the fluorescence of the oxidation product (λ_exc.= 365 nm and λ_em.= 440 nm). The calibration graph is linear in the range 50–400 ng ml^–1 of zinc (accuracy ±2.0%). The proposed method suffers from very few interferences and has been applied satisfactorily to the determination of zinc in several commercially available milk samples.

Keywords

This publication has 0 references indexed in Scilit: