Organic reagents for the identification of Bi(V) and O 2 2– in Ba–Bi–O and K–Ba–Bi–O oxides using field test methods

Abstract

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 KnBamBim + nOy (n = 1–3; m = 1, 3–5) oxides, having superconducting properties (Ts = 28–32 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 22–and Bi(V). It was found that Bi(V), unlike O 22–, 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 22–. It was found that, in reactions with amines and dyes, Bi(V) is a stronger oxidant than O 22–. The detection limits for Bi(V) with DPA, Arnold’s base, benzidine, o-tolidine, Methyl Red, Indigo Carmine, and Thoron are determined.