1820
ANALYTICAL CHEMISTRY
T h e noninterference of fluoride is significant in that, although it can usually be removed by efficient fuming, such a process is time-consuming and in the case of radioactive solutions may be highly undesirable. Cationic Interferences in Titration. Possible cationic interferences in the amperometric titration of Group I V B metals with cupferron are evident from the earlier zirconium studies (24, 26). Iron( 111), vanadium(V), niobium(V), uranium(IV), and large amounts of tin(1V) are the only common interfering metals.
Table V.
Effect of Fluoride on Amperometric Titration of Titanium and Hafnium lIoiar Ratio, F t o Metal Titanium
Miilirnole Metal I
