Determination of Trace Phthalic Acid Esters in Leaching Solution of Plastic Food Packaging by Single-Drop Microextraction-Gas Chromatography

Abstract:

The determination methods for three kinds of phthalic acid esters in leaching solution of plastic food packaging using Single-drop microextraction(SDME) couple with gas chromatography-hydrogen flame ionization detector(GC-FID) was developed in this study.The optimum conditions for the assay were detected and listed as follows: with 1.4 μL xylene as the organic extractant,extraction time 20 min,the extraction temperature 40℃,stiring speed 200 rpm.Under the optimum conditions,the DMP,DEP and DBP had the linear range of 0.1-100 μg/mL and the detection limits were 0.01 μg/mL.The actual sample recovery was 97-113.9% d.This method is proved to be a simple,fast and low cost approach for determination of trace phthalic acid esters in leaching solution of plastic food packaging.