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通过激光诱导分解检测 (LIBD) 来量化纳米塑料和无机纳米粒子

Minh N Nguyen¹, Pia Lipp², Ines Zucker³

¹Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.

|April 8, 2025

概括

激光诱导分解检测 (LIBD) 在水中提供高度敏感的纳米粒子量化,即使在低度. 这种方法超越了检测纳米塑料和无机纳米粒子的其他技术.

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:

在水环境中量化各种纳米颗粒,特别是纳米塑料 (10^6-10^9颗粒/毫升),对于评估水处理效率至关重要.
现有的方法,如度监测,紫外线光谱和纳米粒子跟踪分析,对于低度纳米粒子检测的灵敏度有局限性.

研究的目的:

评估激光诱导分解检测 (LIBD) 的灵敏度,特别是检测极限 (LOD),用于计数包括纳米塑料在内的各种纳米粒子.
将LIBD的LOD与水中纳米粒子量化常规方法进行比较.

主要方法:

激光诱导分解检测 (LIBD) 用于量化聚钢 (PS) 纳米粒子 (20-400 nm) 和纳米塑料 (PS,聚烯,聚乙烯二甲).
通过LIBD实现的LOD与度监测,紫外线光谱和纳米粒子跟踪分析进行了比较.

主要成果:

与其他方法 (6 × 10^8到2 × 10^7) 相比,LIBD显示PS纳米颗粒的LOD显著较低 (例如100nm的2 × 10^6颗粒/毫升).
对于纳米塑料,LIBD实现了更低的检测极限 (10^4 - 10^5颗粒/毫升),比PS标准好一到两个数量级.
LIBD成功量化了无机纳米颗粒 (泽奥利特,泰坦尼亚,血),并且显示出更高颗粒密度的敏感性.

结论:

LIBD是一种强大而高度敏感的技术,用于在环境相关的低度下计数各种纳米粒子,包括纳米塑料.
LIBD的低LOD使其适用于监测处理过的水中的纳米粒子水平,例如膜系统透物.
LIBD有可能用于膜完整性监测和膜过程的基础研究.

关键词:

工程制造的纳米粒子.微塑料微塑料的使用在线监测水质水质监测.微粒计数微粒计数微粒计数软与硬纳米粒子之间的区别

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