Determination of the relative amounts of free and complexed manganese ions in aqueous solution by nuclear magnetic resonance

• Published in: Analytical chemistry (Washington) Vol. 63; no. 24; pp. 2919 - 2924
• Main Authors: Kellar, Kenneth E, Foster, Natalie
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 15.12.1991
• Subjects: Analytical chemistry; Chemistry; Exact sciences and technology; Magnetic Resonance Spectroscopy; Manganese - analysis; Solutions; Spectrometric and optical methods; Chemical analysis; Spin lattice relaxation; Organic ligand; Manganese III Complexes; Metalloporphyrin; NMR spectrometry; Aqueous solution; Speciation; Manganese II Ions

The ratio of the transverse relaxation rate to the longitudinal relaxation rate of water protons (T1/T2) at 90 MHz can be used to determine the relative amounts of free Mn2+ ions (the hexaquo ion) and chelated manganese ions when both species are present in the same aqueous solution. This technique...