非目标高分辨率质谱指纹用于定性和定量来源分配的应用:真实案例研究
Di Xia1,2, Lijun Liu1,2, Bo Zhao1,2
1South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
Environmental science & technology
|December 15, 2023
概括
高分辨率质谱仪 (HRMS) 指纹被用于追踪城市流中的新兴关注污染物 (CEC). 这种方法成功地识别和量化了污染源,有助于环境保护战略.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水质监测 水质监测
背景情况:
- 新兴关注的污染物 (CEC) 对水生生态系统构成风险.
- 城市流中的CEC的来源分配是复杂的.
- 高分辨率质谱 (HRMS) 提供先进的化学分析能力.
研究的目的:
- 应用HRMS指纹来定性和定量跟踪切贝溪流中CEC的来源.
- 区分和量化各种污染源 (主流,支流,雨水排放) 的贡献.
- 评估基于HRMS的资源分配在现实世界城市水生环境中的有效性.
主要方法:
- 利用液体染色学-HRMS进行非目标查 (NTS) 来识别潜在的CEC.
- 为不同的污染源开发了源特定的HRMS指纹.
- 使用稀释曲线选用于定量来源归因.
主要成果:
- 确定了254个潜在的CEC特征.
- 建立了成千上万的特定来源的HRMS指纹,用于主流,支流和雨水下水.
- 量化下游来源贡献,估计范围在8-96%之间,取决于来源和地点.
- 在税收整合之前,观察到累计贡献在103-114%之间,之后降至52%.
结论:
- 人力资源管理系统指纹为水生环境中CEC的定性和定量源追踪提供了强大的工具.
- 这个开创性的应用程序在现实场景中展示了基于HRMS的源分配的可行性.
- 这些发现支持为城市水体制定有针对性的环境保护战略.
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