Determination of ferrous and total iron in refractory spinels

• Published in: Analytica chimica acta Vol. 910; pp. 25 - 35
• Main Authors: Amonette, J.E., Matyáš, J.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 03.03.2016; Elsevier
• Subjects: 1,10-Phenanthroline; analytical chemistry; Colorimetry; crystals; detection limit; Emission analysis; Ferrous ammonium sulfate; ferrous ammonium sulfate, potassium bromide; Ferrous ethylenediammonium sulfate; Ferrous iron; glass; hybrids; Hydrofluoric acid; Inductively coupled plasma; Iron; lithium; maghemite; magnetite; Nickel; Potassium bromide; Potentiometry; Reagents; Silver; Spectroscopy; Spinel; United States Geological Survey; 1,10-Phenanthroline; Ferrous ammonium sulfate; Silver; Ferrous iron; Spinel; Potassium bromide; Hydrofluoric acid; Nickel; Potentiometry; Ferrous ethylenediammonium sulfate

Accurate and precise determination of the redox state of iron (Fe) in spinels presents a significant challenge due to their refractory nature. The resultant extreme conditions needed to obtain complete dissolution generally oxidize some of the Fe(II) initially present and thus prevent the use of col...