Interaction of copper (II) with 1-(2-thenoyl)-4-trifluorine2-[2-hidroxy-3-carboxy-5-sulphophenylazo] butadion-1,3 in the presence of cationic surfactants

The complexation of copper (II) with 1-(2-thenoyl)-4-trifluorine2-[2-hidroxy-3-carboxy-5-sulphophenylazo]butadion-1,3 in the presence of cationic surfactants — cetylpyridinium chloride, cetylpyridinium bromide, cetylpyridinammonium bromide is studied by photometric method. And also it is established in the presence of surfactants, that optimal conditions of complexation improved, complexation displaced to the acidic area and with increasing of the stability of associates detection limit of copper decreased. The influence of foreign ions and masking compounds on the complexation is learned. The technique of photometric determination of copper (II) in aluminum alloys is worked out.