Thiopicolinamide and pyridine-2, 6-dithioamide were investigated as spectrophotometric reagents for iron. Both reagents form soluble blue colored species with iron (II) ion in basic solutions. The tris-thiopicolfuarnide-iron (II) complex exhibits a wavelength of maximum absorption at 615 mμ with a molar absorptivity of 13,600. The bispyridine-2, 6-dithioarnide-iron (II) complex exhibits a wavelength of maximum absorption at 600 mμ with a molar absorptivity of 21,000. A sensitive method for the determination of iron based upon the latter complex is proposed.
Proceedings of the Iowa Academy of Science
©1965 Iowa Academy of Science, Inc.
Pflaum, Ronald T.; Brunzie, Gerald F.; and Cook, Lawrence E.
"Pyridine Thioamides as Analytical Reagents for lron,"
Proceedings of the Iowa Academy of Science, 72(1), 123-131.
Available at: https://scholarworks.uni.edu/pias/vol72/iss1/21