嫌疑人选和优先考虑作为一种分析策略,用于识别地表水中的持久性,移动性和有毒物质 (PMT)
Lesly Ayala Cabana1,2, Alejandra Arcas2, Isabel López-Heras2
1Geography and Environment Department, Faculty of Sciences, University of Alcalá, Geology, External Campus, Ctra. A-II km 33.6, Alcalá de Henares 28871, Madrid, Spain.
这项研究确定了废水影响的地表水中的103种持久,移动和有毒物质 (PMT). 目前,许多PMT化学物质不受监管,这凸显了改善环境监测的必要性.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 持久性,移动性和有毒性物质 (PMT) 由于其在水循环中的移动性而构成风险.
- 检测极性PMT物质具有挑战性,限制了当前的环境监测.
- 污水处理厂的废水是PMT污染的重要来源.
研究的目的:
- 确定和优先考虑PMT物质,以监测受废水影响的表面水域.
- 开发和应用一种分析方法来检测广泛的PMT化合物.
- 评估已识别的PMT物质的监管状态.
主要方法:
- 使用液体染色学高分辨率质谱法 (LC-HRMS) 的嫌疑人选分析 (SSA).
- 阶层优先级策略,整合多模式固相提取 (SPE) 和LC技术.
- 使用分析标准和双重质谱法 (MS/MS) 确认高优先级的PMT物质.
主要成果:
- 暂时确定了305种物质,优先考虑103种在各种化学类中作为PMT化合物.
- 发现,目前只有13%的优先PMT物质受到欧盟立法或REACH的监管.
- 确认了35种高优先级的PMT物质,包括新型化合物,如赛莱科西布,双三甲硫胺和DTG,具有可靠的MS/MS数据.
结论:
- 该研究提出了一个强大的方法框架,用于在环境样本中检测和优先考虑PMT物质.
- 强调目前对PMT化学品的法规和监测计划存在重大差距.
- 强调SSA作为传统目标分析的补充工具的价值,用于全面的环境评估.
更多相关视频
09:04Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
Published on: April 18, 2019
07:13Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
Published on: February 25, 2021
相关概念视频
Voltammetry: Stripping Methods
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
Gravimetry: Inorganic And Organic Precipitating Agents
Sampling Methods: Sample Types
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
Gas Chromatography: Types of Detectors-II
High-Performance Liquid Chromatography: Types of Detectors
