Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1448, Issue -, Pages 42-48Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2016.04.062
Keywords
Cross-linked microspheres; Micro-solid phase extraction; Extraction efficiency; Gas chromatography-mass spectrometry; BTEX-S
Funding
- Singapore Peking Oxford Research Enterprise program of the National University of Singapore Environmental Research Institute (NERI) [(NERI) R-706-000-100-414]
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Chitosan (CS) microspheres were synthesized by the precipitation method and cross-linked with glutaraldehyde. The cross-linked CS microspheres (20 mg) were used as sorbents for the micro-solid phase extraction (mu-SPE) of benzene, toluene, ethylbenzene, xylenes and styrene (BTEX-S) from water. The SPE device consisted of a sealed polypropylene envelope housing the microspheres for the evaluation of the extraction efficiency. Analysis was by gas chromatography-mass spectrometry (GC-MS). Under the optimized conditions, the method provided linearity range of between 0.5 and 50 mu g L-1 with good correlation coefficients of between 0.985 and 0.998. The relative standard deviations of mu-SPE coupled with GC-MS were found to be between 2 and 3%. Method detection limits for BTEX-S were in the range of between 0.01 and 0.04 mu g L-1 while the relative recoveries were in the range of between 59 and 97%. The proposed method is a cost effective, fast and environmentally friendly extraction technique with ease of operation and minimal usage of organic solvent. (C) 2016 Elsevier B.V. All rights reserved.
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