J. Ehrethenry et al., STYRENE AND ETHYLBENZENE MIGRATION FROM POLYSTYRENE INTO DAIRY-PRODUCTS BY DYNAMIC PURGE-AND-TRAP GAS-CHROMATOGRAPHY, Journal of food science, 59(5), 1994, pp. 990
Ethylbenzene and styrene were determined by an automated dynamic heads
pace system with a purge-and-trap injector. Hydrocarbons were purged w
ith He into a cold trap and separated by GC. The procedure was applied
to dairy products without sample preparation. Preliminary He treatmen
t, temperature of condenser, and of the analytical cell were important
. Results of styrene migration from the package into dairy products, i
ncluding yogurts, cream and chocolate desserts, were well below 50 mu
g/kg.