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Chen M.-L.,Zhejiang Shuren University | Min J.-Q.,Zhejiang Shuren University | Cai M.-Q.,Zhejiang GongShang University | Pan S.-D.,Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province Ningbo Municipal Center for Disease Control and Prevention Ningbo | Jin M.-C.,Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province Ningbo Municipal Center for Disease Control and Prevention Ningbo
Journal of Separation Science | Year: 2016

A new facile, rapid, inexpensive, and sensitive method for the analysis of six trace trichlorophenols in seawater samples was developed by magnetic micro-solid-phase extraction coupled to liquid chromatography with tandem mass spectrometry. Core-shell covalently functionalized ferroferric oxide coated with aminated silicon dioxide and decorated with multiwalled carbon nanotubes was applied as an adsorbent to perform the extraction process. The effect of factors including solution pH, contact time, adsorbent amount, and ionic strength were investigated in detail. The obtained results revealed that the proposed adsorbent was a highly effective and low-cost magnetic micro-solid-phase extraction material for the enrichment of 2,3,4-trichlorophenol, 2,3,5-trichlorophenol, 2,3,6-trichlorophenol, 2,4,5-trichlorophenol, 2,4,6-trichlorophenol, and 3,4,5-trichlorophenol from seawater. Under the optimized conditions, the recoveries ranged from 88.0 to 99.5% at the three spiking levels, the limits of detection and the limits of quantification were 0.002 and 0.007 μg/L for the six trichlorophenols, respectively. The intra- and interday relative standard deviations were 2.0-6.7 and 4.5-8.9%, respectively. The calibration curves showed a good linearity in the range of 0.02-5.0 μg/L. The routine run analyses showed that the developed method was fast, simple, accurate, solvent-saving and high resolution, and it was suitable for the determination of trace trichlorophenols in seawater. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Chen X.-H.,Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province Ningbo Municipal Center for Disease Control and Prevention Ningbo | Pan S.-D.,Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province Ningbo Municipal Center for Disease Control and Prevention Ningbo | Ye M.-J.,Hangzhou Tea Research Institute China COOP Hangzhou China | Li X.-P.,Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province Ningbo Municipal Center for Disease Control and Prevention Ningbo | And 2 more authors.
Journal of Separation Science | Year: 2016

A novel triethylenetetramine-functionalized magnetic graphene oxide composite was prepared and used as a magnetic solid-phase extraction adsorbent for the fast detection of ten trace-level phenolic environmental estrogens in environmental water. The synthesized material was carefully characterized by scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and X-ray photoelectron spectroscopy to confirm the structure and components. The adsorption and desorption conditions of the adsorbent toward phenolic environmental estrogens were optimized in detailed to obtain the best extraction recovery and elution efficiency. Under the optimum conditions, the limits of detection of the method for ten phenolic environmental estrogens were in range of 0.15-1.5 ng/L, which was lower than the reported methods for phenolic environmental estrogens detection in literatures. This could be contributed to the unique structure and property of the as-prepared material. The developed method was successfully applied for the determination of environmental water samples with recoveries ranging from 88.5 to 105.6%. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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