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基于CO2的矩阵独立的碳量化方法用于单个微塑料-ICP-MS分析

Kristina Mervič¹, Agil Azimzada², Mehmet Emin Bayat³

¹Department of Analytical Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, SI-1000, Slovenia.

Analytical and bioanalytical chemistry

|June 5, 2025

概括

一种新的基于二氧化碳 (CO2) 的校准方法使用sp-ICP-MS.精确测量微塑料 (MP) 颗粒大小 (2-7μm). 这种独立于矩阵的方法增强了微塑料分析和环境监测.

科学领域:

环境化学环境化学
分析化学分析化学
材料科学材料科学材料科学

背景情况:

精确的微塑料 (MP) 尺寸测定对于环境监测至关重要.
使用sp-ICP-MS进行MP尺寸分析的现有方法经常存在矩阵和尺寸依赖校准问题.
需要一个强大而独立的校准策略来可靠地量化MP.

研究的目的:

开发和验证一种基于二氧化碳 (CO2) 的新校准方法,用于对微塑料颗粒的矩阵独立尺寸确定.
为了使微塑料在2至7微米范围内使用单颗粒感应合等离子体质谱法 (sp-ICP-MS) 进行准确的尺寸测量.
为了克服微塑料分析当前校准方法的局限性.

主要方法:

在sp-ICP-MS工作流程中实施二氧化碳气体校准战略.
调整仪表流量以优化粒子信号检测.
使用扫描电子显微镜 (SEM) 验证开发的方法,并分析各种矩阵 (河水,盐溶液) 中的样本.

主要成果:

基于二氧化碳的校准证明了微塑料大小测定的优良线性和可重复性.
在各种样本类型中观察到最小的矩阵效应,证实了该方法的矩阵独立性.
实现了2至7微米的微塑料颗粒的精确大小测定,并通过SEM验证.

结论:

开发的基于二氧化碳的校准方法为使用sp-ICP-MS的微塑料尺寸确定提供了强大而准确的解决方案.
这种方法有效地消除了依赖于矩阵和尺寸的校准限制,提高了分析可靠性.
这一进步有助于更精确的环境监测和塑料污染的评估.

关键词:

气体校准气体校准在ICP-MS中,使用的是ICP-MS.微塑料是一种微塑料.量化量化量化量化单个粒子分析

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