Spectrophotometric determinations based on the formation of tris-1,10-phenanthroline iron(II)

Abstract

In a recent publication (/), it was shown that the reaction of nitrilotriacetatoferrate(III) [Fe(III)NTA] with cysteine in the presence of 1,10-phenanthroline formed the basis for the quantitative determination of cysteine in the concentration range of 10-6-10-4M. Tris-1,10-phenanthroline iron(II) is

Spectrophotometric Determination of Fe(II)EDTA-NO, Fe(II)EDTA/Fe(III)EDTA in Chemical Absorption-Biological Reduction Integrated NO_x Removal System

“…As Fig. 1b) shows, the colored solution obtained a maximum absorbance at a wavelength of 510 nm, which is highly consistent with the reference data [19]. Therefore 510 nm was selected as the optimal wavelength in the determination of ferrous iron.…”

“…The determination of Fe(II)EDTA and Fe(III)EDTA, which needs the help of color reaction, is different from that of Fe(II)EDTA-NO due to their spectral characteristics. In a previous publication, it was shown that tris-1, 10-phenanthroline iron(II) is produced in stoichiometric amounts and spectrophotometrically determined at 510 nm [19]. To confirm its suitability in our case, the percent transmittance of the prepared solution was measured and recorded every 10 nm (every 2 nm around the maximum absorbance) in a wavelength range of 440-550 nm.…”

“…In this paper, an effective method for the determination of key chemical species in this system was proposed and the relationship among them was pointed out. Based on the spectrophotometric determination of ferrous iron by 1, 10-phenanthroline [19], with consideration of the chelating impact of EDTA on iron, an effective method was developed to detect the valence state of iron through optimizing determining conditions according to the characteristic of this system. The determination of Fe(II)EDTA-NO was also studied.…”

Simultaneous determination of ferrocyanide and ferricyanide in aqueous solutions using infrared spectrometry

“…tometry (7,8), and electroanalytical techniques (9)(10)(11)(12) have been used. These methods, however, are reasonably lengthy procedures which may require several steps in order to mask or separate interfering ions.…”

Differential pulse polarographic determination of 2,3-dimercaptosuccinic acid and tin(II) in radiopharmaceuticals

“…UV procedures (8,9) depend on the I thiol reducing properties and are inappropriate in the presence of another reducing agent. Since tin(I1) is present in the kidney re- This paper expands on this recent work and presents a quantitative and qualitative technique to analyze both the chelated and unchelated forms of I and tin(@ in a mixture of the two.…”