Titration of phytic acid.
Titrimetric assays for phytic acid by titration with iron(III) or thorium are described. Stannous chloride interferes in both systems, causing negative errors directly proportional to the amount of stannous chloride. The thorium:phytate ratio in the complex formed is 2:1, which is interpreted as resulting from the possession of two chelating centres by phytic acid.
Reeves
R J
RJ
Diagnostic Isotopes Incorporated, Bloomfield, NJ 07003, U.S.A.
Carroll
R T
RT
Gennaro
G P
GP