Simultaneous Determination of Ethylbenzene and Styrene in Food-Package by Headspace-Gas Chromatography

A method has been developed for simultaneous determination of ethylbenzene and styrene in food-package by headspace-gas chromatography. The experimental conditions of headspace and GC were optimized. The detection limits of ethylbenzene and styrene were 1 mg/kg and 2 mg/kg, respectively; the recovery for ethylbenzene and styrene were 93.1 % and 93.5 %, and the relative standard deviations (RSD) were 2.35 % and 1.23 %. The modified method is rapid, accurate, sensitive and reproducible and is suitable for monitoring trace ethylbenzene and styrene in food-package.