Analytical application of phenylbenzene sulphazide in separation and determination of selenium.
In this paper the utility of phenylbenzene sulphazide is illustrated by its application to the determination of selenium and the separation of this element from tellurium, lead, copper, bismuth, nickel and iron. Selenious acid is reduced to black selenium in acid media at 100 degrees . To minimize interference by other elements but yet give rapid recoveries of selenium an acidity of 40% (v/v) formic/acetic acid is recommended. The co-precipitation of tellurium is prevented by adding tartaric acid. Oxalate, tartrate, citrate, EDTA and phosphate do not interfere.
Diwan
J K
JK
Department of Chemistry, Government College of Science, Raipur, 492-002 (M.P.), India.
Satyanarayana
K
K