自动顶空气相色谱法与溶剂萃取气相色谱法测定饮用水中苯

Determination of Benzene in Drinking Water by Automated Headspace Gas Chromatography and Solvent Extraction Gas Chromatography

摘要: 采用自动顶空气相色谱法分析饮用水中苯,并对气相色谱条件和顶空条件进行了优化,与国标GB/T5750.8-2006中规定的溶剂萃取方法进行了比较. 方法在0.00~105.00 μg/L范围内具有良好线性关系,相关系数大于0.999,最低检出限为0.004 2 mg/L,回收率在96.2%~98.7%之间,相对标准偏差为0.70%. 实验结果表明,自动顶空气相色谱法更为简便、准确、灵敏、基体干扰少.

Abstract: Benzene in drinking water was analyzed by the automated headspace gas chromatography, gas chromatography conditions and headspace conditions were optimized, and compared with the solvent extraction method specified in the National Standard GB/T5750.8-2006. The automatic headspace gas chromatographic method has good linearity in the range of 0.00~105.00 μg/L, the correlation coefficient was better than 0.999, with a lowest detection limit of 0.0 042 mg/L, the recovery rate was 96.2%~98.7%, the relative standard deviation of 0.70%. The experimental results showed that the automatic headspace gas chromatography is more convenient, accurate, sensitive, with less disturbance.