Colorimetric determination of traces of selenium, tellurium, manganese and cerium.
Methods are described for the colorimetric determination of micro- and semi-micro quantities of selenium, tellurium, cerium and manganese. The test solution in 0.35-3M condensed phosphoric acid medium is oxidized with an excess of permanganate. The colour intensity of the unreacted permanganate is measured at 530 nm.
Naidu
P P
PP
Department of Chemistry, Andhra University, Waltair, India.
Rao
G G
GG