EDTA solution becomes slurry

Yoram Gerchman via methods%40net.bio.net (by gerchman from research.haifa.ac.il)
Sun May 31 07:29:54 EST 2009

EDTA will not dissolve until pH 8 is reached, hence the "white slurry". Simply
keep adding NaOH while measuring pH (I suggest using a pH paper, not an
electrode). When you get near pH=8 you will see sudden clearance of the
solution. You can definitely start with NaOH pellet (add a little and let it
dissolve completely before adding more) and use NaOH solution only for final
adjustment. Preparing EDTA solution is a slow process...

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