Polarographic determination of phosphorus
R Pardo1, E Barrado, Y Castrillejo
1Departamento de Química Analítica, Facultad de Ciencias, Universidad de Valladolid, Valladolid, España.
Abstract:
A method has been developed for the determination of phosphorus, as phosphate, by means of the catalytic polarographic wave for the reduction of hydrogen peroxide in the presence of Mo(VI). This reduction is combined with the previous formation and extraction of 12-molybdophosphoric acid. Depending on the extractant chosen, ethyl acetate or methyl isobutyl ketone, the determination limit is 2.3 or 3.1 mug l . respectively. The procedure has been applied to certified steel samples with good results.
Related Concept Videos
Voltammetric Techniques: Linear-Scan (E vs Time)
Photoluminescence: Applications
Gas Chromatography: Types of Detectors-II
Controlled-Potential Coulometry: Electrolytic Methods
The chosen potential ensures...


