NDLI: Multi-walled carbon nanotubes for the dispersive solid-phase extraction of the phytoestrogen genistein from water samples using high performance liquid chromatography

Content Provider	Royal Society of Chemistry (RSC)
Author	Xu, Xu Long, Na Zhang, Jing Qi, Xinyu Zhang, Lei Zhang, Minhui
Copyright Year	2015
Abstract	A modified method based on dispersive solid-phase extraction (dSPE) combined with high performance liquid chromatography (HPLC) was developed for the determination of genistein (GEN) in water samples. In this study, multi-walled carbon nanotubes (MWCNTs) were used as a dSPE adsorbent for the preconcentration of analytes. HPLC was used for separation and detection. This is the first time that GEN was simultaneously extracted and preconcentrated by MWCNTs-based dSPE. Several experimental parameters, including the amount of sorbent, extraction time, pH and ionic strength of sample solution, and desorption conditions, were evaluated. Besides, the adsorption type, and dynamics and thermodynamics of adsorption of GEN on MWCNTs were investigated in detail. Under optimal experimental conditions, good linearity was observed in the range of 1.0–500.0 ng mL−1 with a correlation coefficient of 0.9990. The limit of detection and quantification were 0.29 ng mL−1 and 0.97 ng mL−1, respectively. The MWCNTs have higher stability within eight removal–regeneration recycles and up to 95% of recovery could be achieved using ionic liquid elution. The present method was applied to the analysis of different water samples, and the recoveries of GEN obtained were in the range of 88.3–101.4% with relative standard deviations lower than 6.8%. The results showed that the proposed method is a rapid, convenient and feasible method for the determination of GEN in water samples.
Starting Page	3570
Ending Page	3580
Page Count	11
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	7
Issue Number	8
Journal	Analytical Methods
DOI	10.1039/c4ay02872d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Carbon nanotube GEN Solid phase extraction Adsorption Ionic strength Genistein PH High-performance liquid chromatography Ionic liquid
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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