Diformylhydrazine as analytical reagent for spectrophotometric determination of iron(II) and iron(III).
The bidentate ligand diformylhydrazine (OHC-HN-NH-CHO), DFH, combines with iron(II) and iron(III) in alkaline media in the pH range 7.3-9.3 to form an intensely colored red-purple iron(III) complex with an absorption maximum at 470 nm. Beer's law is obeyed for iron concentrations from 0.25 to 13 microg mL(-1). The molar absorptivity was in the range 0.3258x10(4)-0.3351x10(4) L mol(-1) cm(-1) and Sandell's sensitivity was found to be 0.0168 microg cm(-2). The method has been applied to the determination of iron in industrial waste, ground water, and pharmaceutical samples.
Nagabhushana
B M
BM
Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore-560054, India.
Chandrappa
G T
GT
Nagappa
B
B
Nagaraj
N H
NH
D002138:Calibration; D005618:Fresh Water / Q000032:analysis; D006834:Hydrazines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis; D007501:Iron / Q000032:analysis* / Q000737:chemistry; D008024:Ligands; D004364:Pharmaceutical Preparations / Q000032:analysis; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis
D006834:Hydrazines; D007202:Indicators and Reagents; D007220:Industrial Waste; D008024:Ligands; D004364:Pharmaceutical Preparations; C017224:1,2-diformylhydrazine; D007501:Iron