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Iron sequestration by polyphosphates
Author(s) -
Irani R. R.,
Morgenthaler W. W.
Publication year - 1963
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02633692
Subject(s) - polyphosphate , ferrous , pyrophosphate , ferric , chemistry , ferric iron , inorganic chemistry , dissociation (chemistry) , phosphate , biochemistry , organic chemistry , enzyme
The equilibrium sequestration of ferric and ferrous iron by polyphosphates has been measured at room temperature in the pH range of 4舑11. In general, sequestration decreases with increase in pH or increase in the chain length of the polyphosphate. The dissociation constants of ferric pyrophosphate and ferric tripolyphosphate have been estimated to be around 10 蜢23 . The polyphosphates form weaker ferrous complexes.