顶空气相色谱法测定水中苯胺

Determination of Aniline in Water with Head-Space Gas-Chromatography

采用顶空气相色谱法测定水中的苯胺，对盐类及其用量、顶空温度等条件进行了优化。当加入5gNaOH，80℃进行顶空时，苯胺在0．02～0．50mg／L范围内线性良好，方法检出限0．002mg／L，样品加标平行测定的RSD〈5．0％，回收率〉95％。方法操作简单，检出限低，适用于水体中苯胺的测定。

In this study, Head-space Gas-Chromatography method was used for the determination of aniline in environmental water samples. Experiment conditions such as salts kind, its amount and head space temperature were optimized. When 5 g NaOH was added and head-space temperature was 80 ℃ , aniline has good response linearity in the range of 0.02 - 0. 50 mg/L. The detection limit is 0. 002 mg/L. The recovery was larger than 95% and the relative standard deviations was lower than 5.0%. The method is simple and fast and suitable for the determination of aniline in water samples.