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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/131696
Título: 
Magnetically separable polymer (Mag-MIP) for selective analysis of biotin in food samples
Autor(es): 
Instituição: 
  • Universidade Estadual Paulista (UNESP)
  • Laboratory of Physical Chemistry Research, Faculty of Science, National University of Engineering, Tupac Amaru 210 Av., Rimac, Lima, Peru.
  • Group de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona, Spain.
ISSN: 
0308-8146
Resumo: 
This work presents an efficient method for the preparation of magnetic nanoparticles modified with molecularly imprinted polymers (Mag-MIP) through core-shell method for the determination of biotin in milk food samples. The functional monomer acrylic acid was selected from molecular modeling, EGDMA was used as cross-linking monomer and AIBN as radical initiator. The Mag-MIP and Mag-NIP were characterized by FTIR, magnetic hysteresis, XRD, SEM and N2-sorption measurements. The capacity of Mag-MIP for biotin adsorption, its kinetics and selectivity were studied in detail. The adsorption data was well described by Freundlich isotherm model with adsorption equilibrium constant (KF) of 1.46 mL g(-1). The selectivity experiments revealed that prepared Mag-MIP had higher selectivity toward biotin compared to other molecules with different chemical structure. The material was successfully applied for the determination of biotin in diverse milk samples using HPLC for quantification of the analyte, obtaining the mean value of 87.4% recovery.
Data de publicação: 
1-Jan-2016
Citação: 
Food Chemistry, v. 190, p. 460-467, 2016.
Duração: 
460-467
Publicador: 
Elsevier B. V.
Palavras-chaves: 
  • Biotin
  • Imprinted polymers
  • Magnetic nanoparticles
  • Magnetic-mip
  • Milk
Fonte: 
http://dx.doi.org/10.1016/j.foodchem.2015.05.129
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/131696
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