11 semi-volatile organic compounds in soil by magnetic stirring method were determined.20.0 g prepared soil samples were weaghted,with(1+1)chloride-acetone mixture as extraction agent,keeping the magnetic speed speed for high speed,extracted for 30 min in 45 ℃,drying by anhydrous sodium sulfate,concentrated,by high throughput vacuum parallel concentration instrument purified to 1.0 mL by florida silicon soil solid phase extraction column,11 kinds of semi-volatile organic compounds in soil were analyzed by gas chromatography-mass spectrometer,and determined by internal standard.The correlation coefficients between 11 semi-volatile compounds concentrations range of 1.0 to 40 mg/L were greater than or equal to 0.994,the detection limit was in the range of 0.05 to 0.1 mg/kg,The lower measurement limit was in the range of 0.2 to 0.4 mg/kg,55.7％to 106％,the relative standard deviation was in the range of 0.8％to 12％,and the detection limit was in the range of 0.04 to 0.4 mg/kg,lower measurement limit was in the range of 0.16 to 1.6 mg/kg,47％to 119％,relative standard deviation was in the range of 2.9％to 44％.Compared to the detection limit,lower measurement limit,spiking recovery rate,the relative standard deviation all meet the requirements.
关键词
磁子转速/提取剂温度/提取时间/提取效率/土壤/11种半挥发性有机物
Key words
magnetic speed speed/extraction temperature/extraction time/extraction efficiency/soil/11 kinds of semi-volatile organic compounds
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