Interlaboratory Study on Volatiles Test for Food-Contacting Polystyrene Products

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  • ポリスチレン製器具・容器包装における揮発性物質試験の試験室間共同試験
  • ポリスチレンセイ キグ ・ ヨウキ ホウソウ ニ オケル キハツセイ ブッシツ シケン ノ シケンシツカン キョウドウ シケン

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Abstract

<p>Using polystyrene, acrylonitrile-styrene resin and acrylonitrile–butadiene–styrene resin pellets as samples, an interlaboratory study was performed to evaluate the volatiles test method, based on the specifications described in the Japanese Food Sanitation Law for food-contacting polystyrene products. The study was conducted with the participation of twenty-one laboratories. Each laboratory quantified the contents of styrene, toluene, ethylbenzene, isopropylbenzene and propylbenzene in three test pellets using GC-FID, GC-MS or headspace-GC-FID. Statistical analysis revealed that the repeatability (RSDr) and reproducibility (RSDr) were 1.0–2.6 and 2.5–5.5% for the GC-FID method. The values of the performance parameters fulfilled the requirements (RSDr: 10%, RSDr: 25%), and the performance is sufficient for specifications testing. The RSDr and RSDr of results obtained using the GC-MS and HS-GC methods were 1.4–7.8 and 4.9–13%(GC-MS), and 2.0–2.6 and 3.3–6.9%(HS-GC-FID), respectively. The quantified levels were similar to those obtained with GC-FID. The study suggests that the GC-MS and HS-GC methods can be employed as alternative methods to the GC-FID method.</p>

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