Hygienic Studies on Plastic Containers and Packages (II)

Analysis of Styrene Monomer in Food Content

Abstract

The determination of migrated styrene monomer (SM) and ethylbenzene (EB) in foods by mass fragmentography was studied.
The apparatus for the extraction of the migrated substances used was an essential oil distillator shown in Fig. 1. The samples such as noodle-soup and sour milk beverage packed in polystyrene cup. After the sample was placed in a flask, extracting flask was heated in a mantle heater for 60min, using n-pentane as the solvent to collect the migrated substances. After distillation, n-pentane layer was transferred in a small test tube quantitatively, SM and EB were determined by mass fragmentography.
The recoveries of SM and EB in noodle-soup and sour milk beverage by the proposed method were at least more than 90%. Analysis of SM and EB in food was simplified by this method, beside the migrated substances were determined without any influences of obstructive substances.