关于LA-ICP-MS中碳的双相样本运输及其在聚合物矩阵中微金属分析的实际含义:分类和灵敏度
Lukas Brunnbauer1, David Ken Gibbs1, Andreas Limbeck1
1TU Wien, Institute of Chemical Technologies and Analytics, Getreidemarkt 9/164-I2AC, Vienna, 1060, Austria.
Analytica chimica acta
|September 3, 2025
概括
这项研究显示了聚合物类型如何影响使用激光除诱导合等离子体质谱法 (LA-ICP-MS) 检测 (Pb). 研究人员开发了一种识别聚合物类型的方法,
科学领域:
- 分析化学
- 材料科学
- 环境科学
背景情况:
- 对合成聚合物中的微量金属含量进行监测对于制造和回收至关重要.
- 评估微塑料对环境的影响需要了解它们的金属含量.
- 激光除-诱导合等离子体质谱 (LA-ICP-MS) 是用于直接聚合物分析的敏感技术,但需要矩阵匹配的标准.
研究的目的:
- 研究聚合物类型和激光切除 (LA) 参数对 (Pb) 敏感性的影响.
- 探索LA-ICP-MS在聚合物分类中的潜力.
- 建立一种方法来简化对量化分析的矩阵匹配标准的选择.
主要方法:
- 使用LA-ICP-MS分析了五种不同类型的Pb标准.
- 记录单脉冲响应 (SPR) 信号以监测碳 (C) 传输和Pb信号.
- 用多种激光能量研究颗粒和气态碳的形成.
主要成果:
- 聚合物类型显著影响了在剥离过程中形成的颗粒和气态碳物种的比例.
- (Pb) 仅在颗粒阶段进行运输.
- 气态碳物种的比例会影响观察到的Pb信号强度.
- 在薄膜和微塑料样本中使用特有的二相碳运输来证明聚合物类型的识别.
结论:
- 基于碳的样本中的分析物的灵敏度与除过程中形成的气态碳物种的比率有关.
- 基于LA-ICP-MS的聚合物分类有助于选择和应用适当的矩阵匹配标准.
- 这种方法提高了聚合物和微塑料的定量金属分析的准确性.
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