Barium peroxide is identified by the formation of hydrogen peroxide after acidification of the sample (A.4.2), and by the presence of the barium ion: - in the absence of persulphates (A), by adding dilute sulphuric acid to a portion of the acid sample solution (B.4.1), as a result of which a white precipitate of barium sulphate is formed.
En l'absence de persulfates (titre A) : on ajoute de l'acide sulfurique dilué à une partie de la solution d'échantillon acide (titre B, point 4.1), ce qui entraîne la formation d'un précipité blanc de sulfate de baryum.
