【摘要】 以土壤和沉积物中的1,2,4-三氯苯为研究对象,应用超声波提取并以气相色谱进行定量分析。研究结果表明:在一定的超声波处理条件下,1,2,4-三氯苯较为稳定且降解比率很小;最适宜的超声波提取条件为:超声波功率20W、提取温度35℃、提取时间60min、提取剂为石油醚-丙酮混合溶剂(体积比1∶1);三种不同提取方法(索氏、振荡和超声波)相比较以超声波提取法最优;该方法的平均回收率为92 18%、变异系数0 82%、检测限0 0001μg g,可满足土壤中微量有机物定量分析要求。更多还原

【Abstract】 Ultrasonic extraction_GC of 1,2,4_trichlorobenzene in soil and sediment was studied in this paper. Results showed that the degradation rate of 1,2,4_trichlorobenzene was very low in different treatments of ultrasonic extraction and the ultrasonic extraction was the best of three extraction methods (ultrasonic, Soxhlet and shaking). The best ultrasonic extraction conditions were as follows: power 20 W, temperature 35 ℃, time 60min and the mixture of petroleum ether and acetone (1∶1) as solvent. Under the best ultrasonic extraction conditions, the average recovery of 1,2,4_trichlorobenzene in samples was 92.18%, RSD 0.82% and the detection limit 0.0001μg /g.更多还原