水体中有机磷和有机氯农药应急监测方法研究

Research on emergency method for monitoring organphosphorous and organchlorine pesticides in water

建立车载式气相色谱质谱联用仪结合固相微萃取前处理技术测定水体中有机磷农药和有机氯农药的方法。通过对萃取头类型、萃取时间、萃取温度、离子强度和搅拌速度等影响萃取效率因素的研究,获得优化的试验条件,在此条件下,具有相关性好(r≥0.9901)、检出限低(0.12～0.38μg/L)、精密度好(RSD%≤12.6%)、准确度高(回收率在81.8%～98.5%之间)的特点。该方法能快速、有效地对水体中的7种有机磷农药和17种有机氯农药进行定性分析和定量检测,适用于水体中有机磷和有机氯农药污染的应急监测工作。

A new method was established with transportable gas chromatography and mass spectrometryand solid-phase micro-extraction technology for analyzing organphosphorous pesticides and organchlorine pesticides in water.Several SPME controlling parameters including SPME fiber,extraction time,extraction temperature,ion intensity and string rate were studied and optimized.Under optimal conditions,the method possesses good relativity（r≥0.990 1）,low detection limit（0.12~0.38 μg/L）,good analytic precision（RSD%≤12.6%） and excellent accuracy（the average recoveries were between 81.8% and 98.5%）.And the method was able to qualitatively and quantitatively analyze 7 kinds of OPPs and 17 kinds of OCPs in water quickly and effectively.It is suitable for environment emergency monitoring for analysis of OPPs and OCPs in water.