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Talanta

Title:		A comparison of liquid-liquid extraction and stir bar sorptive extraction for multiclass organic contaminants in wastewater by comprehensive two-dimensional gas chromatography time of flight mass spectrometry
Author(s):		Murrell KA; Dorman FL;
Address:		"Department of Chemistry, The Pennsylvania State University, University Park, PA, USA. Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA, USA. Electronic address: fld3@psu.edu"
Journal Title:		Talanta
Year:		2021
Volume:		20200806
Issue:
Page Number:		121481 -
DOI:		10.1016/j.talanta.2020.121481
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"Liquid-liquid extraction (LLE) and stir bar sorptive extraction (SBSE) are extraction methods used for the analysis of contaminants in aqueous samples. In this study, both LLE and SBSE were compared for the extraction of priority pollutants and contaminants of emerging concern (CECs) in wastewater influent and effluent samples, for analysis with comprehensive two-dimensional gas chromatography with time of flight mass spectrometry (GC x GC-TOFMS). The methods were compared for their extraction efficiency of a broad range of compounds, matrix effects, accurate and reliable quantification of targets, and sensitivity. The target analytes studied were semi-volatile organic compounds (SVOC) including polycyclic aromatic hydrocarbons, phenols, phthalate esters, anilines, ethers, aromatic nitro compounds, and nitrosamines. LLE allowed for a higher number of target analytes to be extracted with over 70% recovery and quantified more targets in the influent samples. Matrix interference effects had a negative impact on the recovery of non-polar contaminants, such as polycyclic aromatic hydrocarbons (PAHs), in the influent water samples especially with SBSE. In SBSE, 24 target analytes demonstrated significant matrix interference leading to poor analyte recovery and 13 analytes were negatively affected in the same way in LLE. Generally, polar compounds also demonstrated poor extraction with SBSE in both effluent and influent water samples. However, SBSE effluent chromatograms contained about three times as many total analytes as compared with LLE, suggesting that SBSE is more sensitive for trace contaminants in effluent samples. Based on this research, LLE is recommended for studies seeking to quantify a broad range of target analytes in complex matrices, like wastewater influent. SBSE is an appropriate method for the non-target and survey analysis of trace contaminants in less complex water samples"
Keywords:		Contaminants of emerging concern Liquid-liquid extraction Multiclass organic contaminants Stir bar sorptive extraction Wastewater;
Notes:		"PubMed-not-MEDLINEMurrell, Kyra A Dorman, Frank L eng Netherlands 2020/10/21 Talanta. 2021 Jan 1; 221:121481. doi: 10.1016/j.talanta.2020.121481. Epub 2020 Aug 6"