文摘
We investigated the interaction of aromatic amines, such as diphenylamine (DPA), Arnold’s base (AB), benzidine (B), and o-tolidine (OT), and dyes, namely, Methyl Red (MR), Chromazurol S (CA), Arsenazo III (A), Indigo Carmine (IC), and Thoron (T), with Bi2O3, Bi2O4.09, NaBiO3, BaBiO3, BaBi3O5.55, BaBi5O8.5, and K n Ba m Bi m + n O y (n = 1-; m = 1, 3-) oxides, having superconducting properties (T s = 28-2 K), and BaO2 and H2O2 peroxides. Among the studied amines, only Arnold’s base is not oxidized by peroxides and can serve as a reagent for the identification of peroxide dioxygen O 2 2-/sup> and Bi(V). It was found that Bi(V), unlike O 2 2-/sup> , oxidizes acidic solutions of Methyl Red, Chromazurol S, Arsenazo III, Thoron, and Indigo Carmine, decolorizing them; that is, these dyes may be used in the test methods for identifying Bi(V) and O 2 2-/sup> . It was found that, in reactions with amines and dyes, Bi(V) is a stronger oxidant than O 2 2-/sup> . The detection limits for Bi(V) with DPA, Arnold’s base, benzidine, o-tolidine, Methyl Red, Indigo Carmine, and Thoron are determined. Keywords organic reagents aromatic amines dyes Ba–Bi–O and K–Ba–Bi–O oxide systems valence state Bi(V) peroxide ions O 2 2-/sup> detection limit