期刊
MICROCHIMICA ACTA
卷 180, 期 11-12, 页码 1141-1148出版社
SPRINGER WIEN
DOI: 10.1007/s00604-013-1037-0
关键词
BTEX; Modified dispersive liquid-liquid microextraction; Solidification of floating organic micro drop; Water samples
资金
- Research Council of the Varamin-Pishva Branch, Islamic Azad University
We have developed a modified method for the extraction and preconcentration of benzene, toluene, ethylbenzene and xylenes (BTEX) in aqueous samples. It based on dispersive liquid-liquid microextraction along with solidification of floating organic microdrops. The dispersion of microvolumes of an extracting solvent into the aqueous occurs without dispersive solvent. Various parameters have been optimized. BTEX were quantified via GC with FID detection. Under optimized conditions, the preconcentration factors range from 301 to 514, extraction efficiencies from 60 to 103 %, repeatabilities from 2.2 to 4.1 %, and intermediate precisions from 3.5 to 7.0 %. The relative recovery for each analyte in water samples at three spiking levels is > 85.6 %, with a relative standard deviation of < 7.4 %.
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