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Magnetic mesoporous polyimide composite for efficient extraction of Rhodamine B in food samples.
Hu, Kai; Cheng, Jiamin; Lu, Binbin; Zhao, Wenjie; Dong, Chunhong; Yang, Huaixia; Huang, Yanjie; Zhang, Shusheng.
Afiliação
  • Hu K; Henan University of Chinese Medicine, Zhengzhou, P. R. China.
  • Cheng J; Henan University of Chinese Medicine, Zhengzhou, P. R. China.
  • Lu B; Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, P. R. China.
  • Zhao W; School of Chemistry and Chemical & Environmental Engineering, Henan University of Technology, Zhengzhou, P. R. China.
  • Dong C; Henan University of Chinese Medicine, Zhengzhou, P. R. China.
  • Yang H; Henan University of Chinese Medicine, Zhengzhou, P. R. China.
  • Huang Y; Henan University of Chinese Medicine, Zhengzhou, P. R. China.
  • Zhang S; Center for Advanced Analysis and Computational Science, Zhengzhou University, Zhengzhou, P. R. China.
J Sep Sci ; 42(11): 2023-2031, 2019 Jun.
Article em En | MEDLINE | ID: mdl-30947378
A core-shell structured magnetic polyimide composite has been synthesized by the covalent coating of a mesoporous polyimide polymer onto the surface of magnetite nanoparticles. The nanocomposite was characterized by scanning electron microscopy, transmission electron microscopy, N2 adsorption-desorption isotherms, X-ray diffraction, infrared spectroscopy, and vibrating sample magnetometry. The results showed that the prepared composite had a large surface area (306.45 m²/g), a unique pore size (2.15 nm), and strong magnetic properties (45.7 emµ/g), rendering it a promising sorbent material for magnetic solid-phase extraction. The parameters that affect the extraction efficiency of rhodamine B were optimized with the assistance of response surface methodology. Under the optimal conditions, the developed method has been successfully applied to determine the rhodamine B in food samples. The linearities and limits of detection of rhodamine B in hot pepper, red wine, and chili powder samples were measured. Satisfactory recoveries in the range of 94.8-103.3% with relative standard deviations <5.5% were obtained. Investigation of the adsorption mechanism of magnetic polyimide composite indicated that multiple interactions, including hydrophobic, π-π, and hydrogen bonding interactions, were involved in the adsorption process.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Rodaminas / Vinho / Capsicum / Extração em Fase Sólida / Nanocompostos / Magnetismo Tipo de estudo: Evaluation_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Rodaminas / Vinho / Capsicum / Extração em Fase Sólida / Nanocompostos / Magnetismo Tipo de estudo: Evaluation_studies Idioma: En Ano de publicação: 2019 Tipo de documento: Article