Summary
Mercuric nitrate has been successfully used for back titrating excess EDTA amounts than required for chelation with Al3+ or Mn2+ ions. This principle was the basis underlying the potentiometric determination of small amounts of both metals in the range of 10 μg to ∼ 6 mg. End points are attended within 0.01 to 0.02 ml of titrant with fair accuracy and reasonable jumps ranging from 35 to 88 mv per 0.1 ml of titrant.
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Khalifa, H. Back titration with mercuric ntrate in alkaline medium; potentiometric estimation of aluminium and manganese. Z. Anal. Chem. 163, 81–87 (1958). https://doi.org/10.1007/BF00530956
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DOI: https://doi.org/10.1007/BF00530956