School of Food Science and Technology, Dalian Polytechnic University, National Engineering Research Center of Seafood, Dalian 116034, PR China.
School of Food Science and Technology, Dalian Polytechnic University, National Engineering Research Center of Seafood, Dalian 116034, PR China.
Food Chem. 2023 Jul 30;415:135717. doi: 10.1016/j.foodchem.2023.135717. Epub 2023 Feb 18.
Microplastics (MPs) released from food packaging have attracted widespread attention. In this study, drip bags made from polyethylene (PE), polypropylene (PP), polyester (PET), and rayon selected from eight brands were employed to investigate MPs releasing. Fourier-transform infrared microspectroscopy (μ-FTIR), optical microscope and scanning electron microscope (SEM) were used to study the effects of brewing time and temperature on the release of MPs. The results showed that a single plastic coffee bag steeped at 95 ℃ for 5 min could release more than 10,000 MPs particles into a cup of coffee. Irregular blocks, long strips, and size range of 10-500 μm MPs were easier to be released, implying that consuming 3-4 cups of coffee will lead to an intake of 50 thousand MPs particles daily. Rayon was the primary type of released MPs, accounting for over 80% of the total amount of the released MPs. Our results are hoped to provide evaluation standards of material selection for processing coffee bags.
微塑料（MPs）从食品包装中释放出来引起了广泛关注。在这项研究中，选择了来自八个品牌的聚乙烯（PE）、聚丙烯（PP）、聚酯（PET）和人造丝制成的滴滤袋，用于研究 MPs 的释放情况。傅里叶变换红外显微镜（μ-FTIR）、光学显微镜和扫描电子显微镜（SEM）用于研究酿造时间和温度对 MPs 释放的影响。结果表明，一个 95℃浸泡 5 分钟的单一塑料咖啡袋可以将超过 10000 个 MPs 颗粒释放到一杯咖啡中。不规则块状、长条状和 10-500μm 的 MPs 更容易释放，这意味着每天饮用 3-4 杯咖啡将导致摄入 5 万个 MPs 颗粒。人造丝是释放的 MPs 的主要类型，占释放的 MPs 总量的 80%以上。我们的研究结果有望为咖啡袋加工材料选择提供评价标准。
