title: Phosphomolybdic acid as a reagent for the spectrophotometric determination of certain phenothiazine derivatives of pharmaceutical products.
abstract: Phosphomolybdic acid is used as reagent for colorimetric determination of phenothiazine derivatives in various pharmaceutical products. The reagent oxidizes the derivative to a cationic free radical, with which it then forms a coloured salt. The method is simple and rapid. A preliminary extraction is necessary if certain reductants (sulphite or ascorbic acid) are present as stabilizers of the pharmaceuticals, as otherwise they reduce the reagent to phosphomolybdenum blue.
authors.affiliation: Faculty of Pharmacy, Str. Universitatii 16, Iasi, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Stan
authors.forename: V
authors.initials: V
authors.lastname: Dorneanu
authors.forename: G
authors.initials: G
authors.lastname: Ghimicescu