1. Determination of the oxidation states of iron in natural waters. A review
2. 2) K. L. Cheng, K. Ueno, T. Imamura: "Handbook of Organic Analytical Reagents", p. 309 (1982), (CRC Press, Boca Raton).
3. 3) JIS K 0102, 工業排水試験方法 (1993).
4. 4) American Public Health Association, American Water Works Association, Water Environment Federation: "Standard Methods for the Examination of Water and Wastewater", 20th ed., p. 3 (1998).
5. Determination of iron in natural waters and plant material with 1,10-phenanthroline by flow injection analysis