Chelating iron

[Dima Klenchin]

In article <6vd012$c90$1 at gwsun.medinf.mu-luebeck.de>, "Lars Komorowski" <larskomo at physik.mu-luebeck.de> wrote:
:I am in need of a strong chelating agent for iron ions. It want to remove
:the central ion in haem to destroy the spectrum. Who can help ?
:Lars
:

Unlikely there is anything stronger than DTPA (AFAIR, around 10^13 for 
trivalent metals). 

        - Dima