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Beijing, China

Zhang C.,Beijing Labtech Group | Wang H.,Tsinghua University | Zhang X.,Beijing Labtech Group | Ma Z.,Beijing Labtech Group | And 3 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2011

A method of gel permeation chromatography-high performance liquid chromatography (GPC-HPLC) was established for the simultaneous determination of 5 main phthalate plasticizers in foods (edible oil, instant noodles, fried pastries, Saqima, etc.). The samples were extracted with petroleum ether in an ultrasonator, purified by a GPC column, and analyzed by HPLC. The chromatographic separation was achieved on a Labtech-C18 column (250 mm × 4.6 mm, 5 μm) using acetonitrile and water mixture as the mobile phases in a gradient elution mode. The developed method exhibited a linear correlation coefficient of more than 0.997 and the detection limits of 3.25-13.4 μg/L. The spike recoveries were between 70.4% and 113.6% with the relative standard deviations (RSDs, n=3) of 0.3%-5.8% at the spiked level of 50 mg/L. This method is simple, rapid and practical, and can be used for the simultaneous determination of PAEs in grease food samples.

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