摘要
建立了超声波萃取-SPE硅胶小柱净化-双柱双检测器气相色谱法测定土壤和沉积物中20种有机氯农药的方法。样品中添加高纯铜粉除硫,二氯甲烷超声萃取9 min,使用SPE硅胶小柱,9 mL丙酮:正己烷(1:9)洗脱净化。采用单进样口,双色谱柱双μ-ECD同时分离测定。土壤和沉积物样品中的方法检出限为0.001 mg/kg,平均回收率为73.17%~112.5%,相对标准偏差为0.33%~16%。
The determination method of 20 organochlorine pesticides in soil and sediment by ultrasonic wave extraetion-SPE silica column cleanup-gas chromatography combined with dual-column and dual-ECD was proposed. High-purified copper powder was added into the sample to remove sulfur. The sample was extracted by ultrasonic wave with CH2C12 for 9 minutes and purified by SPE silica column with 9 mL of acetone:hexane ( 1 : 9). Single injector, dual-column and dual-ECD were adopted to detect the target compounds. The detetion limit of method was 0. 001 mg/kg, deviations were from 0. 33% average recoveries were in the range of 73.17% -112. 5% and relative standard to 16%.
出处
《分析试验室》
CAS
CSCD
北大核心
2012年第9期99-105,共7页
Chinese Journal of Analysis Laboratory
关键词
有机氯农药
土壤和沉积物
超声波萃取
SPE净化
双柱双检测器
Organochlorine pesticides
Soil and sediment
Ultrasonic wave extraction
SPE cleanup
Dual-column and dual-ECD