Kinetic determination of tellurium based on its inhibitory effect on the palladium(II)-catalysed reaction between pyronine G and hypophosphite ion.
A kinetic method for the determination of Te based on its inhibitory effect on the PdII-catalysed reaction between pyronine G and H2PO2- is described. The influence of experimental variables on the rate of the process and the potential interfering effect of a large number of ions has been studied. Under the selected experimental conditions: 6 x 10(-5) M pyronine G; 0.6 M H2PO2-; pH 2.6, adjusted with Britton-Robinson buffer; 0.80 microgram ml-1 of PdII; and a temperature of 22 +/- 0.2 degrees C, Te was determined in the concentration range 0.08-0.85 microgram ml-1. The method was applied to the determination of Te in waters and lead concentrates.
Sánchez-Pedreño
C
C
Department of Analytical Chemistry, Faculty of Sciences, University of Murcia, Spain.
Albero
M I
MI
Soledad García
M
M
Saez
A
A
D002253:Carbonated Beverages / Q000032:analysis; D007700:Kinetics; D007854:Lead / Q000032:analysis; D010165:Palladium / Q000737:chemistry*; D010721:Phosphinic Acids / Q000138:chemical synthesis*; D011754:Pyronine / Q000737:chemistry*; D013053:Spectrophotometry; D013691:Tellurium / Q000032:analysis* / Q000494:pharmacology; D014867:Water / Q000032:analysis
D010721:Phosphinic Acids; D014867:Water; D007854:Lead; D010165:Palladium; C009287:sodium hypophosphite; D013691:Tellurium; D011754:Pyronine