全自动定量浓缩-气相色谱法分析地表水中的有机氯农药

摘要

Organochlorine pesticides in water were extracted by n-hexan,the extracted liquid was concentrated to 1mL with fully automated quantitative concentrator in the water bath temperature 35℃and the vacuum 300mbar.Which only need 25min. Organochlorine pesticides were determined by gas chromatograph after samples pre-treatment by liquid-liquid ex⁃traction with n-hexane and concentration with fully automated quantitative concentrator.The detection limits of method for organochlorine pesticides were in the range of 0.001~0.008μg/L.The average recoveries were 78.6%~104%. This method had advantages of good accuracy and precision,rapid,high degree of automation and was suitable for batch samples.%地表水中的有机氯农药用正己烷萃取后，用全自动定量蒸发浓缩仪在水浴温度35℃，真空度为300mbar时浓缩定容到1mL，一个样品只需要25min。用液液萃取-全自动定量浓缩仪-气相色谱法分析地表水水中的有机氯农药，该方法的检出限为为0.001～0.008μg/L，方法的平均回收率在78.6％～104％之间。该方法检出限低，精密度好，省时省力，自动化程度高，适合于大批量样品的监测。