Interlaboratory study on volatiles test for food-contacting polystyrene products
2016
Sonobe, H. (Japan Recreation and Miscellaneous Goods Safety Laboratory, Sumida-ku, Tokyo (Japan)) | Mutsuga, M. | Abe, T. | Abe, T. | Abe, Y. | Ohsaka, I. | Ohno, H. | Ohno, H. | Ohno, Y. | Ohata, M. | Ozaki, A. | Kakihara, Y. | Kobayashi, H. | Shibata, H. | Sekido, H. | Takasaka, N. | Takenaka, Y. | Tajima, Y. | Tanaka, A. | Tonooka, H. | Nakanishi, T. | Nomura, C. | Haneishi, N. | Hayakawa, M. | Hikida, A. | Matsuyama, S. | Miura, T. | Yamaguchi, M. | Watanabe, K. | Sato, K. | Akiyama, H.
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 (RSDsub(r)) and reproducibility (RSDsub(R)) were 1.0-2.6 and 2.5-5.5% for the GC-FID method. The values of the performance parameters fulfilled the requirements (RSDsub(r): 10%, RSDsub(R): 25%), and the performance is sufficient for specifications testing. The RSDsub(r) and RSDsub(R) 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.
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