Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 60, Issue 22, Pages 5524-5531Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf300660m
Keywords
dummy imprinted solid-phase extraction; molecularly imprinted microspheres; phthalate esters; gas chromatography; bottled beverages
Funding
- National Natural Science Foundation of China [20905019, 21011140338]
- Natural Science Foundation of Hebei [B2010000209]
- Science Foundation of Education Department of Hebei Province [CPRC003]
- Excellent Youth Foundation of Hebei University
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In this paper, a highly selective sample cleanup procedure combing dummy molecular imprinting and solid-phase extraction (DMI-SPE) was developed for the simultaneous isolation and determination of five phthalate esters in plastic bottled beverages. The new imprinted microspheres were synthesized via precipitation polymerization using diisononyl phthalate as a dummy template that showed high selectivity and affinity to the five kinds of phthalate esters and were successfully applied as selective sorbents of DMI-SPE for the simultaneous determination of the phthalate esters from plastic bottled beverages. Good linearity was obtained in a range of 5.0-750.0 mu g/L, and the average recoveries of the five phthalate esters at three spiked levels ranged from 84.3 to 96.2% with the relative standard deviations less than 5.49%. The developed extraction protocol eliminated the effect of template leakage on quantitative analysis and could be applied for the determination of phthalate esters in complicated functional beverages products.
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