摘要
建立了一种快速、简便、灵敏的反乳化分散液液微萃取新方法,并与高效液相色谱联用成功用于环境水样中2,4-二氯酚与2,6-二氯酚的测定。对萃取条件(如萃取剂、分散剂/反乳化剂的种类和体积、盐浓度、p H等)进行了优化,得到了最佳的反乳化分散液液微萃取条件。对2,4-二氯酚与2,6-二氯酚测定的线性范围分别为5~600μg/L(r=0.999 8)和5~600μg/L(r=0.999 7),检出限(3σ)为2.06μg/L和2.88μg/L。对200μg/L的标准溶液测定得到的相对标准偏差(RSD)分别为1.71%和2.67%(n=6)。该方法已成功用于3种实际环境水样中痕量2,4-二氯酚与2,6-二氯酚的测定,加标回收率为83.2%~118.2%,RSD为0.56%~17.81%(n=3)。
A rapid, simple and sensitive method, the demulsified dispersive liquid-liquid microextraction was established, and coupled with high performance liquid chromatography, which was successfully used for the determination of 2,4- dichlorophenol(2,4-DCP) and 2,6-dichlorophenol (2,6-DCP) in environmental water samples. The extraction conditions such as the type and volume of extraction solvent and dispersive/demulsified solvent, salt concentration, pH and other factors were optimized, the best demulsified dispersive liquid-liquid microextraction conditions were found. Through the determination of 2,4-DCP and 2,6-DCP, the linear range of 2,4-DCP and 2,6-DCP were 5~600 μg/L(r=-0.999 8)and 5~600 μg/L(r=0.999 7) respectively. The limits of detection(LOD) (3δ) were 2.06 p.g/L and 2.88 μg/L. To determine the standard solution of 200μg/ L, the relative standard deviation (RSD) were 1.71% and 2.67%(n=6)respectively. The developed method was successfully applied to the determination of trace amount of 2,4-DCP and 2,6-DCP in three kinds of real environmental water samples, with the spiked recoveries in the range of 83.2%~118.2% and RSD of 0.56%~17.81% (n=3).
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第5期90-94,101,共6页
Environmental Science & Technology
基金
成都信息工程学院科研人才基金资助(J201215)
关键词
反乳化
分散液液微萃取
高效液相色谱法
二氯酚
环境水样
demulsified
dispersive liquid-liquid microextraction (DLLME)
high performance liquid chromatography(HPLC)
dichlorophenol(DCP)
environmental water samples