Phytates present in wheat grains act as complexing agents and cause chelation of metal cations like Zn2+ affecting their availabilty in the human body. How can the phytate concentration in wheat grains be analysed?
Please go through our recent article in Journal of Cereal Science 56 (2012) 741-746 entitled Invitro dephytinzation and bioavailability of essential minerals in several wheat varieties. It contains all the methodology of phytate estimation and bioavailability.