NDLI: Comparison of subcritical water extraction and microwave-assisted water extraction for the determination of chlorophenols in polluted lake sediments

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Comparison of subcritical water extraction and microwave-assisted water extraction for the determination of chlorophenols in polluted lake sediments

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Analytical Methods Vol - 4 Issue - 2

Analytical Methods Vol -3

Analytical Methods Vol -2

Analytical Methods Vol -1

Comparison of subcritical water extraction and microwave-assisted water extraction for the determination of chlorophenols in polluted lake sediments

Content Provider	Royal Society of Chemistry (RSC)
Author	Shao, Xiumei Lu, Xiaohua Wang, Li Wang, Linling Miao, Zhu Chen, Jing
Copyright Year	2012
Abstract	Two environmentally friendly sample preparation methods, subcritical water extraction (SWE) and microwave-assisted water extraction (MAWE) coupled to the gas chromatography with electron capture detector (GC-ECD), were evaluated and optimized for the sensitive, selective and solvent-free determination of four chlorophenols (2-chlorophenol, 2,4-dichlorophenol, 4-chlorophenol and pentachlorophenol) in polluted Ya-Er Lake sediments. An orthogonal array design L9 (33) was applied to select the optimum conditions for SWE. The best results as regards sensitivity, repeatability and analyte recovery were obtained using SWE with 9 mL of sodium hydroxide solution (pH 9), at 150 °C for 80 min. The best extraction conditions for MAWE were obtained by using the same extractant as SWE at 900 W and 0.2 MPa for 6 min. Under final working conditions, satisfactory recoveries of individual chlorophenols (CPs) were obtained in the range of 77.7–113.0% and 83.5–104.7% for SWE and MAWE respectively. The effectiveness of the extraction conditions proposed in both methods was evaluated for the extraction of 2,4-DCP in lake sediments with different sample characteristics such as organic carbon and water content. The results indicated that sediments containing relatively low amounts of organic carbon can be quantitatively extracted by both extraction methods. For sediments with larger amounts of organic carbon, the MAWE-based method showed a little better result for analyte recovery than SWE.
Starting Page	844
Ending Page	848
Page Count	5
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	3
Journal	Analytical Methods
DOI	10.1039/c2ay05715h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electron capture detector Analyte Extraction (chemistry) Carbon dioxide Orthogonality Barcelona Metro line 9 Sodium hydroxide Gas chromatography Sweden Chlorophenol 2,4-Dichlorophenol 2-Chlorophenol PH Pentachlorophenol
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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