Osaka Institute of Public Health, 8-34, Tojo-cho, Tennouji-ku, Osaka 543-0026, Japan.
Osaka Institute of Public Health, 8-34, Tojo-cho, Tennouji-ku, Osaka 543-0026, Japan.
Food Chem. 2022 Dec 15;397:133758. doi: 10.1016/j.foodchem.2022.133758. Epub 2022 Aug 3.
Head space (HS)-GC-MS was used to analyze possible migration of volatile compounds from polyethylene terephthalate (PET) bottles for soft drinks, and a total of six compounds were identified. Next, a rapid, simple, and accurate simultaneous method was established using purge-and-trap (PT)-GC-MS, to quantify their amounts in the liquid contents after short- and long-term storage in PET bottles. Starting with brand-new PET bottles, the maximum migration of 2-methyl-1,3-dioxolane into distilled water and 50 % aqueous ethanol after 2 years at 25 °C were 2.3 and 19 ng/mL, respectively. In commercially available bottled mineral water sold inside and outside Japan, we were able to detect 2-methyl-1,3-dioxolane in the same way. While nonanal was also detected in some products, 2-methyl-1,3-dioxolane was confirmed as the main volatile compound. Finally, the human exposure to 2-methyl-1,3-dioxolane was estimated based on the per capita intake of soft drinks in Japan and the migration amount in this study.
采用顶空-气相色谱-质谱联用技术（HS-GC-MS）分析了软饮料用聚对苯二甲酸乙二醇酯（PET）瓶中挥发性化合物的可能迁移情况，共鉴定出 6 种化合物。然后，建立了一种快速、简单、准确的同时测定方法，采用吹扫捕集-气相色谱-质谱联用（PT-GC-MS）法，定量测定了 PET 瓶在短期和长期储存后液体内容物中这些化合物的含量。从全新的 PET 瓶开始，25℃下储存 2 年后，2-甲基-1,3-二恶烷在蒸馏水中和 50%的乙醇水溶液中的最大迁移量分别为 2.3 和 19ng/mL。在日本国内外市售的瓶装矿泉水（包括进口矿泉水）中，我们以同样的方式检测到了 2-甲基-1,3-二恶烷。虽然在一些产品中也检测到了壬醛，但 2-甲基-1,3-二恶烷被确认为主要挥发性化合物。最后，根据日本软饮料人均摄入量和本研究中的迁移量，估算了 2-甲基-1,3-二恶烷的人体暴露量。
