文章基本信息

标题：Identification and Evaluation of Microplastics from Tea Filter Bags Based on Raman Imaging
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作者：Tingna Mei ; Jiahua Wang ; Xiaofeng Xiao 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2022
卷号：11
期号：18
DOI：10.3390/foods11182871
语种：English
出版社：MDPI Publishing
摘要：Microplastic (MP) contamination is a public issue for the environment and for human health. Plastic-based food filter bags, including polyethylene terephthalate, polypropylene, nylon 6 (NY6), and polyethylene, are widely used for soft drink sub-packaging, increasing the risk of MPs in foods and the environment. Three types of commercially available filter bags, including non-woven and woven bags, were collected, and MPs released after soaking were mapped using Raman imaging combined with chemometrics. Compared with peak area imaging at a single characteristic peak, Raman imaging combined with direct classical least squares calculation was more efficient and reliable for identifying MP features. Up to 94% of the bags released MPs after soaking, and there was no significant correlation with soaking conditions. Most MPs were tiny fragments and particles, and a few were fibrous MPs 620–840 μm in size. Woven NY6 filter bags had the lowest risk of releasing MPs. Source exploration revealed that most MPs originated from fragments and particles adsorbed on the surface of bags and strings. The results of this study are applicable to filter bag risk assessment and provide scientific guidance for regulating MPs in food.
关键词：plastic-based filter bag;microplastics;Raman imaging;risk assessment;origin exploration