m-NITROPBENYLARSONIC ACID AS A POLAROGRAPHIC REAGENT FOR TITANIUM
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Abstract
A study was made of the variables affecting the quantitative
precipitation of titanium with m-nitrophenylarsonic acid. The
precipitate formed in the presence of a large excess of reagent was found,
by a polarographic method, to be the di-m-nitrophenylarsenate.
The precipitation was shown to be the basis for an accurate method
for the polarographic determination of titanium. Several complex alloys
of widely differing compositions were successfully analyzed for titanium
by this new method.
The feasibility of an amperometric titration of titanium with nnitrophenylarsonic acid was demonstrated. Under the conditions of an
amperometric titration, the composition of the precipitate is apparently
the mono-m-nitrophenylarsonate.