[A method of determining trace amounts of aromatic amines in dyed cotton textiles].

A method is described for determination of trace amounts of aromatic amines present as toxic contaminants in samples of dyed cotton textiles. The study was carried out on samples of cotton textiles for children, two were dyed beige and aquamarine , one was white. A distillation-spectrophotometric method was used based on the diazo reaction of sodium nitrate + with amines and coupling reaction with alpha-naphthol. The intensity of the obtained colour was proportional to amine content in the sample. The absorbance of the colour solution was measured at 570 nm wavelength. It was shown that the tested samples contained only traces of aromatic amines calculated as aniline++--0.85-3.22 mg/kg (the acceptable amount is 40 mg/kg). The proposed method makes possible objective determination of aromatic amines in textiles, it is simple and highly effective, with detectability of the order of 10(-7) g/cm3. It may be used for amine determination in industry.