通过使用过纤维辅助的矩阵固相分散合与微塑辅助的冷蒸气生成来评估城市颗粒物中的总
Qing Tan1, Yuan Yang2, Linshan Yang3
1Chengdu Ecological and Environmental Monitoring Center of Sichuan Province, Chengdu, Sichuan, 610066, China.
Analytica chimica acta
|June 14, 2024
概括
一种使用过纤维辅助矩阵固相分散和冷蒸汽生成原子光谱学的新方法精确地测量了颗粒结合 (PBM). 这种技术为环境分析提供了提高灵敏度和减少试剂的使用.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
背景情况:
- 精确测量颗粒结合 (PBM) 对于了解的全球循环及其对健康和生态系统的影响至关重要.
- 目前用于PBM的分析方法通常受到昂贵的设备,繁的程序和敏感度不足的限制.
研究的目的:
- 开发一种精确可靠的方法来量化颗粒结合 (PBM).
- 为现有检测技术提供简化和更敏感的替代方案.
主要方法:
- 使用过器纤维辅助矩阵固相分散 (FF-MSPD) 来有效地从过器中提取PBM.
- 使用单滴溶液电极排放诱导冷蒸气产生 (SD-SEGD-CVG) 用于将转换为Hg0.
- 使用原子光谱法 (AFS) 分析了Hg0.
主要成果:
- 在12 m3的样本体积下,达到0.17 pg m-3的检测极限 (LOD).
- 在几个月内收集的PM2.5和PM10的19个样本中成功检测到.
- 与现有技术相比,该方法的灵敏度明显更高.
结论:
- 拟议的FF-MSPD和SD-SEGD-CVG-AFS方法为PBM量化提供了一个简单,敏感和高效的方法.
- 优点包括简化操作,没有内存效应,减少试剂消耗,降低二次污染.
- 这种技术对于推进环境命运,运输和暴露路径的研究是有价值的.
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