Premium
Poly(styrene‐co‐ N ‐methacryloyl‐ l ‐phenylalanine methyl ester)‐functionalized magnetic nanoparticles as sorbents for the analysis of sodium benzoate in beverages
Author(s) -
Ji Shilei,
Li Nan,
Qi Li,
Wang Minglin
Publication year - 2017
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201600869
Subject(s) - chemistry , styrene , adsorption , phenylalanine , magnetic nanoparticles , sodium benzoate , nuclear chemistry , solid phase extraction , polymer chemistry , polymerization , methyl benzoate , nanoparticle , polymer , organic chemistry , extraction (chemistry) , chromatography , amino acid , copolymer , materials science , biochemistry , nanotechnology
In this study, poly(styrene‐co‐ N ‐methacryloyl‐ l ‐phenylalanine methyl ester)‐functionalized magnetic nanoparticles were constructed and used as magnetic solid‐phase extraction sorbents for analysis of food preservatives in beverages. To prepare the poly(amino acid)‐based sorbents, N ‐methacryloyl‐ l ‐phenylalanine methyl ester, and styrene served as the functional monomers and modified onto the magnetic nanoparticles via free radical polymerization. Interestingly, compared with propylparaben and potassium sorbate, the proposed poly(amino acid)‐based sorbents showed a good selectivity to sodium benzoate. The adsorption capacity of the sorbents to sodium benzoate was 6.08 ± 0.31 mg/g. Moreover, the fast adsorption equilibrium could be reached within 5 min. Further, the resultant poly(amino acid)‐based sorbents were applied in the analysis of sodium benzoate in real beverage samples. The results proved that the proposed magnetic solid‐phase extraction sorbents have a great potential for the analysis of preservatives in food samples.