在被动采样的城市空气中,通过非目标选识别的污染物的分布进行映射
Lan Liu1, Antoine P Gillet2, Caren Akiki1
1Department of Food Science and Agricultural Chemistry, McGill University, 21111 Lakeshore, Ste-Anne-de-Bellevue, Quebec, H9X 3V9, Canada.
Chemosphere
|October 1, 2025
概括
这项研究使用非向分析在蒙特利尔确定了25种化学物质,包括新的大气化合物.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 毒理学 毒理学 毒理学
背景情况:
- 空气污染与肺癌有关,但其复杂的化学成分尚不清楚.
- 空气中的半挥发性工业化学品,农药和燃烧副产品可能会对健康产生累积影响.
- 描述室外空气污染对于评估人类健康影响至关重要.
研究的目的:
- 通过非目标分析 (NTA) 综合描述户外城市空气中的化学混合物.
- 识别以前未被探测到的大气化合物并绘制它们的空间分布图.
- 为评估空气中的化学混合物暴露和对健康的影响奠定基础.
主要方法:
- 使用非向分析 (NTA) 结合液态染色学 (LC) 和气态染色学 (GC) 与高分辨率质谱学 (MS).
- 分析了2021年夏天在蒙特利尔82天部署的40个被动空气采样器的样本.
- 应用空间分析,以区分住宅和公共区域之间的化学成分.
主要成果:
- 在户外城市空气中确认了25个分子特征,包括尼特罗,杀虫剂,增塑剂和工业化学品.
- 首次在大气中检测到八种化合物 (例如三乙烯糖醇,酸).
- 确定了与人为活动有关的大气蒸气组成的空间变化.
结论:
- 这项研究提供了第一个使用NTA的户外城市空气的全面化学表征.
- 这些发现揭示了新的大气污染物,并突出了人类活动对空气质量的影响.
- 促进未来对空气中复杂化学混合物的健康影响的研究.
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