摘要
采用正交设计和Box-Penhnken响应面设计,对分散液-液微萃取技术萃取水样中痕量十溴联苯醚的条件进行了筛选和优化,得到最佳条件：四氯乙烯为萃取剂（10μl）、丙酮作分散剂（1ml）、pH范围5-9、离子强度,2%NaCl及萃取时间10min。此优化条件下分散液-液微萃取技术的萃取回收率可达92.37%-104.38%,富集倍数为508-611。优化条件下方法的线性范围为0.01-100ng/ml,检出限（S/N=2）为3.0pg/ml,加标回收率为96.25%-102.16%,精密度为5.44%-6.34%。
Conditions of dispersive liqiuid-liquid microextraction（DLLME） for decabrominated diphenyl ether（decaBDE） at trace level in water sample was investigated and optimized using the multi-factorial orthogonal design and Box-benhnken design.The optimal conditions were obtained as follow： 10μl of extraction solvent（tetrachloroethylene）,disperser solvent（acetone） of 1ml,NaCl of 2%（ionic strength）,pH 5～9,and extraction time of 10min,and validated through the measurement of decabrominated diphenyl ether added in real water samples at different levels. The extraction recovery （ER） was between 92.37% and 104.38%, and enrichment factor （EF） was from 508 to 611. The proposed method exhibited a wide linear range （0.05 - 100ng/mL） under the optimal conditions. The limit of detection （LOD） was 3.0 pg/mL （S/N = 2）, the recoveries were range from 96.25% to 102.16%, and RSDs （n = 3） range was 5.44 - 6.34.
出处
《中国环境监测》
CSCD
北大核心
2009年第6期7-11,共5页
Environmental Monitoring in China
基金
国家“973”计划项目(2004CB3418501)
