微塑料颗粒大小分析的新校准方法是通过激光除单颗颗粒-ICP-MS进行微塑料颗粒大小分析
Lukas Brunnbauer1, Laura Kronlachner1, Elias Foisner1
1TU Wien, Institute of Chemical Technologies and Analytics Getreidemarkt 9/164 1060 Vienna Austria lukas.brunnbauer@tuwien.ac.at andreas.limbeck@tuwien.ac.at.
Journal of analytical atomic spectrometry
|February 3, 2025
概括
本研究提出了一种使用聚烯薄膜进行微塑料 (MP) 大小测定的新校准方法,消除了对认证标准的需求. 这种方法准确地测量了MP的尺寸,并显示了在不同类型的聚合物中具有普遍适用性.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MP) 分析对于环境监测至关重要.
- 准确的国会议员大小测量对于了解其影响至关重要.
- 现有的尺寸方法通常依赖于昂贵的认证标准.
研究的目的:
- 开发一种新的微塑料 (MP) 尺寸校准方法.
- 为了规避在MP分析中需要认证的颗粒物标准.
- 评估开发的校准方法的普遍适用性.
主要方法:
- 使用激光切除 (LA) 来采样和运输MP到ICP-MS.
- 开发了一种内部聚乙烯 (PS) 薄膜用于校准.
- 量化消去的聚合物薄膜将定义的碳量引入ICP-MS.
- 研究的运输效率受粒子大小,聚合物类型和系统参数的影响.
主要成果:
- 实现了4.85 pg碳的检测极限 (LOD),使得2.12 μm球形PS粒子的尺寸可以确定.
- 使用PS薄膜校准准确大小的PS MPs (2μm,3μm,4.5μm).使用PS薄膜校准.
- 使用PS校准,证明了对聚乙烯 (PVC) 和聚甲基酸 (PMMA) MPs的良好尺寸估计.
- 确定了最高达95%颗粒检测效率的最佳条件.
结论:
- 开发的PS薄膜校准方法为MP尺寸提供了一个具有成本效益和普遍适用的替代方案.
- 该方法在不同类型的聚合物中提供了准确的尺寸,这对于环境研究至关重要.
- 优化的LA-ICP-MS参数提高了粒子运输效率,提高了分析可靠性.
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