Murphy Riley and MS analysis of percent P in phytic
acid.
Phytic acid solutions ranging from 10 to 100
ppm phytic acid were prepared from a 50% weight-by-
weight in water stock solution. Phytic acid soluti
ons were
stored in the dark at 3.0°C prior to analysis. Phy
tic acid solutions were analyzed by Murphy Riley
16
and MS using
the procedure described above and instrument specif
ications as listed in Table 2. Percent P was calcu
lated by
dividing the number of phosphates detected by the t
heoretical number of phosphates that are bound to t
he phytic
acid rings.