Spectrophotometric determination of ruthenium with diphenylthiovioluric acid.
Diphenylthiovioluric acid (DPHTVA) reacts with ruthenium(III) to form a complex which has an absorbance maximum at 520 nm. Effects of pH, heating time, buffer and reagent have been studied. DPHTVA has been found to be a sensitive reagent for ruthenium(III) (sensitivity = 0.0044 mug Ru cm (2) for log I(0)/I = 0.001), and has been made selective by the use of masking agents. The composition of the complex as revealed by different methods is 1:2 (ruthenium:DPHTVA).
Chawla
R S
RS
Department of Chemistry University of Delhi, Delhi-7 A.R.S.D. College, New Delhi, India.
Singh
R P
RP
Trikha
K C
KC