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毕文韬副教授和David Chen教授课题组在JOURNAL OF CHROMATOGRAPHY A发表研究论文

发布时间:17-04-27 13:32:16 文章来源:化科院 浏览次数: [ 字号:


Extraction of trace polychlorinated biphenyls in environmental waters by well-dispersed velvet-like magnetic carbon nitride nanocomposites
Li, DD (Li, Dandan)[ 1 ] ; Zhu, J (Zhu, Jun)[ 1 ] ; Wang, M (Wang, Man)[ 1 ] ; Bi, WT (Bi, Wentao)[ 1 ]*(毕文韬); Huang, XH (Huang, Xiaohua)[ 1 ] ; Chen, DDY (Chen, David Da Yong)[ 1,2 ]*(David D.Y.Chen)

[ 1 ] Nanjing Normal Univ, Coll Chem & Mat Sci, Jiangsu Key Lab Biomed Mat, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada

JOURNAL OF CHROMATOGRAPHY A,201703,1491, 27-35

A velvet-like magnetic carbon nitride nanocomposites synthesized by chemical co-precipitation was used to develop a highly efficient magnetic solid-phase extraction method for the pre-concentration of trace polychlorinated biphenyls (PCBs) in water samples. The advantages of this nanocomposite such as large surface area, good dispersity, low solvent consumption, rapid analyte adsorption (30s) and reusability make it a good sorbent. Factors affecting extraction efficiency were systematically investigated and optimized by response surface methodology (RSM). Under optimal experimental conditions, the limits of detection (LODs S/N = 3) of the developed method for PCBs investigated were in the range of 9.0 x 10(-6)-5.8 x 10(-5) mu g/mL. This method was then used for the analysis of four real water samples. Good spiked recoveries over the range of 80.1-118.4%, and RSDs (n=5) of 0.02-3.7% were obtained. This work demonstrated the potential of using this nanocomposite for adsorption, pre-concentration, or even removal of different carbon-based aromatic compounds or other hydrophobic pollutants.


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http://www.sciencedirect.com/science/article/pii/S0021967317302868
 


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