Objective To develop an approach to determining five common environment-polluted phthalate esters(PAEs) in foods by gas chromatography(GC).
Methods After extracted from organic solvent by ultrasonic, cleaned by Alumina N column and concentrated by nitrogen, PAEs in the samples were determined by gas chromatography-flame ionization detector(GCFID).
Results Five PAEs were well-separated from each other. The study showed the correlation coefficients between them were all above 0.999; the average spike recovery rates and the relative standard deviations(RSDs)were in the range of 82.0% to 101.0% and 2.8% to 7.3% respectively; the limits of detection(LODs)were between 2.0 μg/kg and 8.6 μg/kg.
Conclusion The approach was found simple, convenient, economic, sensitive, and applicable to everyday monitoring and inspection of foods for laboratories.
DownLoad: