Simultaneous titrimetric determination of polyphosphoric and sulphuric acids in a mixture.
Polyphosphoric and sulphuric acids in a mixture may be determined simultaneously by titration. Experimental equivalent weights of the separate individual acids are first determined and these values are used to calculate weight percents for each acid in the mixture. Hydrolysis of the polyphosphoric acid (PPA) for three hours is necessary for quantitative conversion into orthophosphoric acid.
Souter
R W
RW
The Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46206, USA.
Bishara
R H
RH