[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [APD] Water soluble micros needs low pH?
>Are you keeping the aquarium at a pH of 4 or are you only
>concerned about solution in storage for a prolonged period?
I'm only concerned about the possibility that the EDTA or
DTPA powder binds with other stuff if the pH is above 4-5 in
the water that is about to be a micronuntrient solution,
instead of the iron, zink, copper etc.
"Determination of Calcium-Magnesium by EDTA Titration"
"all reactions between metal ions and EDTA are pH dependent
, and for divalent ions, solutions must be kept basic (and
buffered) for the reaction to go to completion"
So if you lower the pH in the the EDTA will not react with
Ca, but (hopefully?) better with Iron with the formation
constants in mind?
Reading the archives with the discussion with Greg Morin
about EDTA/gluconate I think I'm a bit out of my league
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com