Spectrophotometric reaction rate method for the determination of molybdenum by its catalytic effect on the oxidation of pyrogallol red with hydrogen peroxide

Authors: Ali A Ensafi, A Haghighi

Publication date:: 1998/3/1

Journal name: Fresenius' journal of analytical chemistry

Volume: 360

Pages: 535-538

Publisher: Springer-Verlag

Abstract A kinetic spectrophotometric method for the determination of molybdenum is based
on its catalytic effect on the oxidation of pyrogallol red with hydrogen peroxide. The
decrease of the absorbance of pyrogallol red in the presence of hydrogen peroxide with time
from 0.5 to 4.5 min is proportional to the concentration of Mo (VI) over the range 0.010–0.500
μg/mL. The limit of detection is 0.008 μg Mo/mL. The precision and the effect of the presence
of more than forty ions on the molybdenum determination are reported. Probable ...