References
1. Vogel's Textbook of Quantitative Chemical Analysis
2. Analytical Chemistry by G.D.Christian
3. Ye, M. Y., W. G. Lyon, AND C. West*. ANALYSIS OF FERRIC AND FERROUS IONS IN SOIL EXTRACTS BY ION CHROMATOGRAPHY. JOURNAL OF LIQUID CHROMATOGRAPHY AND RELATED TECHNOLOGIES. Taylor and Francis, Philadelphia, PA, 21(4):551-565, (1998)
4. Ferrous iron content of intravenous iron formulations.
Gupta A, Pratt RD, Crumbliss AL.
Biometals. 2016 Jun;29(3):411-5. doi: 10.1007/s10534-016-9923-7. Epub 2016 Mar 8.