Journal
JOURNAL OF SEPARATION SCIENCE
Volume 37, Issue 13, Pages 1656-1662Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201400028
Keywords
Graphene oxide; Micro-solid-phase extraction; Parabens; Vinegar; Water
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Funding
- National Natural Science Foundation of China [31171698]
- Scientific and Technological Research Foundation of Department of Education of Hebei Province [ZH2012012]
- Innovation Research Program of Department of Education of Hebei for Hebei Provincial Universities [LJRC009]
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A simple hydrophilic polyamide organic membrane protected micro-solid-phase extraction method with graphene oxide as the sorbent was developed for the enrichment of some parabens from water and vinegar samples prior to gas chromatography with mass spectrometry detection. The main experimental parameters affecting the extraction efficiencies, such as the type and amount of the sorbent, extraction time, stirring rate, salt addition, sample solution pH and desorption conditions, were investigated. Under the optimized experimental conditions, the method showed a good linearity in the range of 0.1-100.0 ng/mL for water samples and 0.5-100.0 ng/mL for vinegar samples, with the correlation coefficients varying from 0.9978 to 0.9997. The limits of detection (S/N = 3) of the method were in the range of 0.005-0.010 ng/mL for water samples and 0.01-0.05 ng/mL for vinegar samples, respectively. The recoveries of the method for the analytes at spiking levels of 5.0 and 70.0 ng/mL were between 84.6 and 106.4% with the relative standard deviations varying from 4.2 to 9.5%. The results indicated that the developed method could be a practical approach for the determination of paraben residues in water and vinegar samples.
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