From the Bounce Zone re: EDTA Chemistry Lesson
---------- Forwarded message ----------
From: David J Snell <dsnell at erols_com>
Subject: EDTA Chemistry Lesson
I have been lurking on this great list since the beginning. This list
truly has a great wealth of information. I have finally decided
to "delurk" and ask some questions and get a little more involved.
My question is on DIY trace elements. I would like to be able to
make my own but I am a little confused on the following
1. How does one make FeEDTA or FeDTPA? I have found several
chemical supply companies that sell EDTA and DTPA, but what
Iron chemical(s) do I mix with it. Or is there a source I don't
know about that will sells it premixed?
2. Based on whatever Iron chemical is used, how much of each
chemical does one mix together in distilled water:
X Iron mixed with Y EDTA = what concentration of FeEDTA or
X Iron mixed with Y DTPA = what concentration of FeDTPA or
X Iron mixed with Y EDTA and Z DTPA = what concentration.
3. Based on question #2, how much of the mixture is added to one
liter of water to obtain a .1ppm concentration of Iron?
(I guess I am asking for a quick chemistry lesson. Sorry, high school
chemistry was too far back to remember all this stuff.)
David J Snell
dsnell at erols_com