液液萃取中半挥发性有机物正辛醇/水分配系数与回收率相关性分析  

Analysis of Correlation between Semi-volatile Organic Compounds' n-Octanol/Water Partition Coefficient and Recoveries of Liquid-Liquid Extraction

作　　者：李庆[1] 刘菲[1] 陈亮[2] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《分析测试学报》2014年第11期1291-1295,共5页Journal of Instrumental Analysis

基　　金：中国地质调查局地质调查项目(1212011121171);科学研究与研究生培养共建项目

摘　　要：该文讨论了水中目标有机物的回收率与正辛醇/水分配系数之间的联系,结果表明半挥发性有机污染物在水中的回收率与正辛醇/水分配系数（lg Kow）间存在一定的规律：当lg Kow〈5时,回收率为16.1%-56.1%,当lg Kow〉5时,回收率为59.5%-124.9%;用溶解度（lg S）与89种有机污染物的回收率进行分析,得出与正辛醇/水分配系数（lg Kow）一致的结论：当lg S〈-0.60时,回收率为59.5%-124.9%,当lg S〉-0.6时,回收率为16.1%-56.1%;采用实际水样的实验室空白加标结果对所得结论进行验证,其结果显示与上述结论一致,即当污染物的lg Kow〉5,或者lg S〈-0.6时,其液液萃取的回收率为85.3%-115.9%。This study aims at getting the relationship between semi-volatile organic pollutants＇ recov- eries of liquid-liquid extraction in water and their n-octanol/water partition coefficients （ lgKow ）. The results showed that, the semi-volatile organic pollutants＇ recoveries in water and their n-octanol/water partition coefficients （lgKow） has the following contact： when lgKow 〈 5, the semi-volatile organic pollutants＇ recoveries in water range from 16. 1% to 56. 1% ; and when lgKow 〉 5, the semi-volatile organic pollutants＇ recoveries in water range from 59.5% to 124. 9%. In the same way, a study on the relationship between semi-volatile organic pollutants＇ recoveries in water and their solubility（lgS） was also carried out, the study about lgS could be used to verify the conclusion obtained. And much the same conclusion was drawn, when lgS 〉 -O. 60, the semi-volatile organic pollutants＇ recoveries ranged from 16. 1% to 56. 1% ; and when lgS 〈 -0. 60, the semi-volatile organic pollutants＇ recov- eries ranged from 59.5% to 124.9%. From above, the conclusion derived from semi-volatile organic pollutants＇ recoveries and lgKow and lgS, respectively, is consistent. During the course of detecting environmental groudwater samples, the recoveries of laboratory fortified blanks and their n-octanol/ water partition coefficients （lgKow） were used to verify the conclusion, and the results showed that it is consistent with that derived by discussing the relationship between semi-volatile organic pollutants＇ recoveries and n-octanol/water partition coefficients ： when lgKow 〉 5, or lgS 〈 - 0. 60, the recover- ies ranged from 85.3% to 115.9%.

关 键 词：半挥发性有机物 回收率 正辛醇/水分配系数 溶解度 

分 类 号：O657.63[理学—分析化学] O741.6[理学—化学]