Citation:
SUN Yaming, WU Qi, GAO Jie, ZHANG Xia, ZHAO Liang, DONG Shuqing. Determination of cinnamic acid and its derivatives by dispersive solid phase microextraction of graphene quantum dots magnetic composite nanoparticles coupled with capillary electrophoresis[J]. Chinese Journal of Chromatography,
;2017, 35(3): 325-331.
doi:
10.3724/SP.J.1123.2016.10017
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Composites of graphene quantum dots (GQDs) and Fe3O4(Fe3O4-GQDs) nanoparticles were prepared via a one-step co-precipitation approach. And the synthesized Fe3O4-GQDs nanoparticles were applied to the extraction of five compounds of cinnamic acid and its derivatives (cinnamic acid, 3,4-dimethoxycinnamic acid, 4-methoxycinnamic acid, ferulic acid and trans-4-hydroxycinnamic acid). Cinnamic acid and its derivatives were detected by capillary electrophoresis (CE). The pH of adsorption solution, adsorption time, amount of adsorbent and desorption time were investigated. The rapid and efficient preconcentration of the five cinnamic acid and its derivatives was successfully obtained with the satisfactory recoveries of 86.2%-96.2%, and relative standard deviations of 1.8%-4.3%. The results indicated that Fe3O4-GQDs magnetic nanoparticles were good pretreatment alternatives.
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