期刊
JOURNAL OF SEPARATION SCIENCE
卷 35, 期 13, 页码 1651-1658出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201101105
关键词
Droplets-based liquid-liquid microextraction; Gas chromatography; Solid phase microextraction; Volatile aromatic hydrocarbons; Water analysis
资金
- West University of Timisoara
- Romanian Ministry of Education (CNCSIS-UEFISCSU) [IDEI 2521]
A new technique for the analysis of volatile aromatic hydrocarbons by combining liquid-liquid microextraction with solid phase microextraction has been developed. The analytes were extracted from aqueous samples by an immobilized polydimethylsiloxane fiber assisted by the droplets of an appropriate organic solvent. Benzene, toluene, ethylbenzene, and o-xylene were used as target analytes. The main factors potentially affecting the microextraction such as the nature and the volume of organic solvent, polydimethylsiloxane (PDMS) swelling, extraction time, agitation, temperature, and salts were optimized. The method requires a very low consumption of organic solvent. The relative enrichment factor is in the range of 7.1-32.4 for extraction in the presence of dichloromethane at an optimum volume of 18 mu L mL(-1) of aqueous sample. This enhancement over regular polydimethylsiloxane fiber is primarily the result of the fiber swelling and of a stable thin layer of organic solvent attached to the surface of the PDMS fiber. The limit of detection ranges from 0.02 to 0.65 ng mL(-1) for the target compounds using a 7-mu m bonded polydimethylsiloxane coating and a flame ionization detector. The validity of this method is demonstrated by the analysis of a real waste water sample.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据