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Solutions of iron tend to oxidize in the presence of air. Ferrous iron oxidizes quickly to Ferric. Ferric iron seems to precipitate at pH > 3 or 3.5. I also noticed a solution of Ferric Nitrate...
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EGTA seems to have much higher affinity for calcium ions, whereas the more popular EDTA seems to bind with many divalent ions like calcium, magnesium, etc. So if a wastewater sample already been...
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