激光除用于在单颗粒ICP质谱学中对微塑料进行非破坏性采样
Thibaut Van Acker1, Ana Rua-Ibarz1, Frank Vanhaecke1
1Department of Chemistry, Atomic & Mass Spectrometry─A&MS research group, Campus Sterre, Ghent University, Krijgslaan 281-S12, Ghent 9000, Belgium.
Analytical chemistry
|December 5, 2023
概括
激光切除 (LA) 有效地取样微塑料颗粒 (MPs) 用于诱导合等离子体质谱法 (ICP-MS) 分析. 这种方法可以检测单个粒子并准确量化2-20μm的MP中的碳.
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:
- 微塑料污染是一个日益严重的环境问题.
- 对微塑料 (MP) 的准确表征对于环境监测至关重要.
- 传统的MP分析方法在灵敏度和样本吞吐量方面存在局限性.
研究的目的:
- 将激光切除 (LA) 描述为采样和将微塑料颗粒 (MP) 引入感应合等离子体 (ICP) 的方法.
- 为了使13C+的监测使用ICP-质谱 (ICP-MS) 在单事件模式下进行单个MP分析.
- 评估LA-ICP-MS对不同MP类型,大小和样本矩阵的性能.
主要方法:
- 激光除 (LA) 用于采样微塑料颗粒 (PS,PMMA,PVC;2-20微米).
- 用于单事件模式的诱导合等离子体质谱法 (ICP-MS) 用于13C+监测.
- 研究了一次性分析和不同激光参数的线扫描. 碰撞反应电池 (CRC) 中的被用来扩展线性范围.
主要成果:
- 洛杉矶成功地引入了完整的MP (2-20μm),而不会影响广泛的能量密度范围 (0.25-6.00 J cm-2) 的采样.
- 一次性分析能够暂时解决单个MP的分析,分离聚类粒子.
- 信号强度显示了线性相关性 (R2>0.9945) 与碳质量为2-10微米的MPs,扩展到20微米的CRC中He.
- 与基于解决方案的方法相比,LA-ICP-MS产生了更窄的C信号分布.
- 该方法在分析混合MP悬浮和从PVDF和玻璃微纤维过器取样方面取得了成功.
结论:
- 激光切除是一种可行的和有效的技术,用于采样和引入用于ICP-MS分析的微塑料颗粒.
- 该LA-ICP-MS方法允许单个粒子分析,精确的碳量化和MP的各种大小和矩阵的表征.
- 这种方法比传统的基于解决方案的方法具有优势,包括更好的信号分布和适用于基于过器的采样.
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