摘要
将分散液液微萃取与气相色谱法技术相结合,建立了测定水样中3种甲基环硅氧烷残留的方法。重点探讨了萃取剂的种类和用量、分散剂的种类和用量、萃取时间及盐浓度等对样品萃取效率的影响。结果表明在优化条件下,待测物在5～100μg/L范围内线性良好(r>0.99),检出限在2～4μg/L之间,富集倍数可达165～170倍,相对标准偏差为4.7%～8.0%。本方法应用于自来水、湖水等实际水样中甲基环硅氧烷残留测定,平均加标回收率为108.1%～112.8%,相对标准偏差为4.9%～8.2%。
A novel method for the determination of three dimethylcydosiloxanes in water samples was developed by using dispersive liquid-liquid microextraction（DLLME） coupled with gas chromatography-flame ionization detection （GC-FID）. The factors relevant to the microextraction efficiency, such as type and volume of extraction solvents and dispersion agent, the extraction time and salt effect were investigated and optimized. Under the optimized extraction conditions, a good linear relationship was obtained in the range of 5 - 100 μg/L of the analytes with the correlation coefficients greater than 0. 99, the detection limits were 2 - 4 μg/L, the enrichment factors ranged from 165 to 170 and the relative standard deviations （RSD） were in the range of 4. 7% - 8. 0%, respectively. The developed method was applied to the determination of three dimethylcydosiloxanes in tap water and lake water samples, the average recoveries were 108. 1% -112. 8% with RSD ranged from 4. 9% to 8.2%.
出处
《分析试验室》
CAS
CSCD
北大核心
2011年第2期66-69,共4页
Chinese Journal of Analysis Laboratory
基金
浙江省分析测试基金(2009F70007)
嘉兴学院SRT重点项目(851709011)
2010年浙江省大学生科技创新团队项目资助
关键词
分散液液微萃取
气相色谱
甲基环硅氧烷
水样
Dispersive liquid-liquid microextraction
Gas chromatography
Dimethylcydosiloxane
Water sample
