地表水挥发性有机物在线监测仪器与方法研究

Development of the Volatile Organic Compounds Monitoring Instrument for Surface Water

报道了力合科技湖南股份有限公司研发的一种吹扫捕集-气相色谱仪针对地表水中挥发性有机物中8种苯系物进行自动在线分析的研究。仪器集自动进样、吹扫捕集浓缩、气相色谱分离检测功能于一体,水中有机污染物经过吹扫捕集浓缩后再进入气相色谱仪进行分离检测。该仪器实现了地表水中挥发性有机物自动在线分析,并在此基础上建立了一种地表水中8种苯系物进行同时测定的在线分析方法。实验结果在2-200μg/mL范围内线性良好,线性相关系数均大于0.999,检出限在0.14-0.39μg/mL范围内。仪器性能稳定可靠,方法的前处理简单快速,重复性较好,适用于地表水中挥发性有机物的测定。

The kind of purge and trap gas chromatography was independently researched. The instrument set automatic sampling, concentration, gas chromatographic separation detection functions in an organic whole, the volatile organic compounds in the water were analyzed with automatic on-line. The method was established by using this instrument for the simultaneous determination of 8 kinds of BETX volatile organic compounds in water. The experimental results showed that the method in 2-200 μg/mL range linear was good, the linear correlation coefficient was greater than 0. 999, and the detection limit was 0. 14 -0. 39 ppb. The instrument performance was stable and reliable, the pre-treatment method was simply and quickly, and repeatability was good. It was very suitable for the determination of volatile organic compounds in surface water.