Spectrophotometric determination of antimony with Bromopyrogallol Red.
Bromopyrogallol Red may be used as a reagent for the spectrophotometric determination of antimony(III) in the range 10-100 microg. The colour system, in the presence of EDTA, cyanide ion or fluoride ion as masking agents, is unaffected by 200-fold molar excesses of 18 cations examined, and a further 5 cations can be tolerated at lower concentrations. The procedure is simple and rapid, and with a molar absorptivity coefficient in excess of 35,000, it compares favourably with the most sensitive of the techniques used at present.
Christopher
D H
DH
Chemistry Department, Imperial College, London S.W.7, England.
West
T S
TS