从聚烯食品容器中释放纳米塑料到热水和冷水中
Ke Shi1,2, Elvis D Okoffo2,3, Wei-Cheng Lu2
1Department of Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, China.
Journal of agricultural and food chemistry
|October 14, 2025
概括
这项研究表明,聚烯食品容器将纳米塑料 (NP) 和微塑料 (MP) 释放到食品中. 较高的温度会增加NP的释放,这表明塑料包装可能是人类暴露的途径.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 食品安全 食品安全
背景情况:
- 塑料食品容器可以将颗粒入食物中,导致人类摄入.
- 研究了微塑料 (MP) 释放,但由于分析困难,纳米塑料 (NP) 数据有限.
- 了解食品包装中的NP释放对于暴露评估至关重要.
研究的目的:
- 为了研究从聚烯 (PP) 食品容器中释放的纳米塑料 (NP).
- 在模拟使用下量化NP和微塑料 (MP) 度.
- 描述释放的NP的大小和化学特征.
主要方法:
- 模拟使用澳大利亚PP食品容器与不同温度的Milli-Q水.
- 纳米粒子跟踪分析 (NTA) 用于大小分布.
- 用多角度光散射 (AF4-MALS) 和 pyrolysis-gas chromatography-mass spectrometry (Pyr-GC-MS/MS) 来分离和化学确认不对称的流场流量分成.
主要成果:
- PP食品容器释放了NP (<1微米) 和MP (1-5000微米).
- NP度在0.01至3.7μg/L之间;MP度在0.4至10.8μg/L之间.
- 与室温相比,较高的NP和MP释放发生在90°C,颗粒大小在122-397nm之间.
结论:
- 在典型的使用条件下,聚烯食品容器释放纳米塑料.
- 高温显著增加纳米塑料的释放.
- 这项研究证实了人类通过食品包装接触纳米塑料的途径.
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