title: Kinetic determination of selenium, based on inhibition of the Pd(II)-catalysed reaction between pyronine G and hypophosphite.
abstract: A new kinetic method for determination of selenium is based on its inhibitory effect on the Pd(II)-catalysed reaction between Pyronine G and hypophosphite. Under the optimum experimental conditions (6 x 10(-5)M Pyronine G, 0.4M hypophosphite, 0.4 mug/ml Pd(II), pH 2.8, temperature 22.0 +/- 0.2 degrees ), Se can be determined in the concentration range 0.033-0.50 mug/ml. The method suffers from numerous interferences and is thus limited in application. It has been applied to the determination of selenium in spring waters and pharmaceutical preparations.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Murcia, Murcia, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Sanchez-Pedreño
authors.forename: M I
authors.initials: MI
authors.lastname: Albero
authors.forename: M S
authors.initials: MS
authors.lastname: Garcia
authors.forename: A
authors.initials: A
authors.lastname: Saez