へッドスペース-GCによるポリスチレン製器具•容器包装中の揮発性物質試験の妥当性評価と実態調査(1998〜2014年)

摘要

A headspace-GC analysis method for the determination of residual volatile substances (styrene, toluene, ethylbenzene, isopropylbenzene and propylbenzene) in food contact polystyrene (PS) was evaluated. Ten PS products were analyzed by this headspace-GC method and the Japanese official method, and the values obtained were almost equal. The performance of the method was evaluated, and the trueness, repeatability and reproducibility were 100.4-102.8%, 3.7-6.3% and 6.0-11.1%, respectively. The values of the performance parameters of the headspace-GC method fulfilled the requirements, and this method was confirmed to be extremely precise. Moreover, contamination of the GC equipment was minimized. The residual volatile substances in 58 PS products were surveyed with this method. All products met the specifications defined in the Japanese Food Sanitation Law, and no relationship was found between volatile substances and the sampling year or country of origin.%ポリスチレン(PS)は，食品トレーやカップなど食品用器具•容器包装に広く使用されている.ポリスチレンの材質中には，未反応モノマーであるスチレンや原料中の不純物，製造時の溶媒などの揮発性物質が含まれている.そのため，食品衛生法では揮発性物質(スチレン，トルエン，エチルベンゼン，イソプロピルベンゼン，プロピルべンゼン)の試験法と材質中の濃度を規定している.