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Determination of organic pollutants in coking wastewater by dispersive liquid–liquid microextraction/ GC / MS
Author(s) -
Song Guoxin,
Zhu Chunyan,
Hu Yaoming,
Chen Jianmin,
Cheng Hefa
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201201151
Subject(s) - extraction (chemistry) , chlorobenzene , chemistry , chromatography , wastewater , pollutant , solvent , persistent organic pollutant , gas chromatography–mass spectrometry , liquid–liquid extraction , environmental chemistry , gas chromatography , detection limit , mass spectrometry , environmental engineering , environmental science , organic chemistry , catalysis
A method based on dispersive liquid–liquid microextraction coupled with GC / MS was developed for quantitative analysis of the major organic pollutants listed in the U nited S tates E nvironmental P rotection A gency method 8270 and the 15 E uropean‐priority polycyclic aromatic hydrocarbons in coking wastewater. The major parameters such as extraction solvent, dispersive solvent, solution pH, and extraction time were systematically optimized. The optimum extraction conditions were found to be: 15 μL mixture of 2:1 v/v carbon tetrachloride and chlorobenzene as the extraction solvent, 0.75 mL ACN as the dispersive solvent, solution pH of 8, and extraction time of 2 min. For the major pollutants listed in the U nited S tates E nvironmental P rotection A gency 8270, the linear ranges were 0.1 to 100 mg/L, the enrichment factors ranged from 452 to 685, and the relative recoveries ranged from 67.5 to 103.5% with RSD s of 4.0–9.1% ( n = 5) at the concentrations of 10 mg/L under the optimum extraction conditions. For the 15 polycyclic aromatic hydrocarbons, the linear ranges were 0.1 to 100 μg/L, the enrichment factors ranged from 645 to 723, and the relative recoveries ranged from 94.5 to 107.6% with RSD s of 4.6–9.0% ( n = 5) at the concentrations of 10 μg/L. The usefulness of the developed method was demonstrated by applying it in the analysis of real‐world coking wastewater samples.