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Traces of aniline and its methyl, methoxyl, and chloro derivatives in river water, sediment, and fish samples were determined by capillary gas chromatography-mass spectrometry after liquid-liquid extraction and steam distillation. Anilines in the concentration range of 0.03–0.10 ng/mL in water could be determined with relative standard deviations of 1.1–22.1 %. The detection limits of the anilines in water, sediment, and fish samples were 0.0042–0.031 ng/mL, 1.2–4.0 ng/g, and 0.5–1.7 ng/g, respectively. Their recoveries from river water, sediment, and fish samples (except for 3,4-xylidine,  m -anisidine, and  p -anisidine) were 101–121%, 71–136%, and 83–117% with percent relative standard deviations of 2.0–11.9%, 6.4–32.5%, and 3.2–9.7%, respectively.

Determination of Anilines in River Water, Sediment, and Fish Samples by Gas Chromatography—Mass Spectrometry