US EPA

3859073 

Journal Article 

Microwave-assisted preparation of poly(ionic liquids)-modified polystyrene magnetic nanospheres for phthalate esters extraction from beverages 

Liu, G; Su, P; Zhou, L; Yang, Y 

2017 

Yes 

Journal of Separation Science
ISSN: 1615-9306
EISSN: 1615-9314 

WILEY-V C H VERLAG GMBH 

WEINHEIM 

40 

12 

2603-2611 

English 

28444842 

10.1002/jssc.201601428 

WOS:000404027800008 

https://search.proquest.com/docview/2020902097?accountid=171501
Exit
 

The fabrication of novel poly(ionic liquids)-modified polystyrene (PSt) magnetic nanospheres (PILs-PMNPs) by a one-pot miniemulsion copolymerization reaction was achieved through an efficient microwave-assisted synthesis method. The morphology, structure, and magnetic behavior of the as-prepared magnetic materials were characterized by using transmission electron microscopy, vibrating sample magnetometry, etc. The magnetic materials were utilized as sorbents for the extraction of phthalate esters (PAEs) from beverage samples followed by high-performance ultrafast liquid chromatography analysis. Significant extraction parameters that could affect the extraction efficiencies were investigated particularly. Under optimum conditions, good linearity was obtained in the concentration range of 0.5-50 (dimethyl phthalate), 0.3-50 (diethyl phthalate), 0.2-50 (butyl benzyl phthalate), and 0.4-50 μg/L (di-n-butyl phthalate), with correlation coefficients R(2)  > 0.9989. Limits of detection were in the range 125-350 pg. The proposed method was successfully applied to determine PAEs from beverage samples with satisfactory recovery ranging from 77.8 to 102.1% and relative standard deviations ranging from 3.7 to 8.4%. Comparisons of extraction efficiency with PSt-modified MNPs as sorbents were performed. The results demonstrated that PILs-PMNPs possessed an excellent adsorption capability toward the trace PAE analytes. 

high-performance liquid chromatography; ionic liquids; magnetic nanospheres; magnetic solid-phase extraction; phthalate esters