推进PET和rPET的分析技术:开发ICP-MS方法用于分析微金属和稀土元素
Fabiana Di Duca1, Paolo Montuori1, Elvira De Rosa1
1Department of Public Health, University "Federico II", Via Sergio Pansini n. 5, 80131 Naples, Italy.
Foods (Basel, Switzerland)
|September 14, 2024
概括
这项研究开发了一种可靠的方法来检测再生PET (rPET) 食品包装中的重金属 (HMs) 和稀土元素 (REEs). 在rPET预成型中发现了最高的污染,这表明干预的关键回收阶段.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 食品安全 食品安全
背景情况:
- 回收聚乙烯二甲酸盐 (rPET) 广泛用于与食品接触材料 (FCM).
- 在回收过程中,RPET中重金属 (HM) 和稀土元素 (REE) 的污染存在有限的研究.
- 了解HM和REE的存在对于确保FCM中rPET的安全至关重要.
研究的目的:
- 验证一种敏感的分析方法,用于量化PET和rPET中的26个HM和4个REE.
- 在各种rPET回收阶段选非故意添加的物质 (NIAS),如HM和REE.
- 在rPET回收过程中识别关键污染点.
主要方法:
- 根据EURACHEM指导方针验证了一种诱导合等离子体质谱法 (ICP-MS) 方法.
- 评估方法性能,包括线性,检测极限 (LOD),量化极限 (LOQ),准确性和可重复性.
- 应用了经过验证的方法来分析PET和rPET片,颗粒和预成型.
主要成果:
- 该ICP-MS方法显示了高精度 (80-120%回收) 和可靠性,用于HM和REE量化.
- 检测到HM (Zn,Cu,Al) 和REEs (La) 的显著度,特别是在100%的RPET预成型中.
- 在不同的回收阶段观察到不同的HM和REE水平,确定了污染热点.
结论:
- 经过验证的分析框架对于评估FCM中rPET中的HM和REE污染至关重要.
- 这些发现强调了在rPET回收过程中的关键污染点需要有针对性的干预措施.
- 确保rPET的安全性有助于公共卫生,监管合规以及循环经济的发展.
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