相关实验视频

Updated: Jul 3, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

通过高分辨率质谱测试,利用可疑和非目标选,在城市雨水排水中对新出现的微污染物进行分析

Daeho Kang¹, Daeun Yun², Kyung Hwa Cho³

¹Department of Environmental Engineering, Changwon National University, Changwon, Gyeongsangnamdo, 51140, South Korea.

|February 12, 2024

概括

城市排水中的新出现的微污染物显示出显著的第一冲水效应 (FFE),影响水质. 疑似和非目标查 (SNTS) 在雨水事件期间有效识别这些多样化的污染物.

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:

城市表面下水是化学污染物进入水生生态系统的主要途径.
城市排水中的遗留污染物已得到充分研究,但新出现的微污染物需要进一步调查.
了解第一冲水效应 (FFE) 对于管理城市雨水质量至关重要.

研究的目的:

通过使用疑似和非目标查 (SNTS) 调查雨水事件中新出现的微污染物的发生和趋势.
评估这些新出现的污染物在城市接收水中的首次冲洗效应 (FFE).
评估SNTS对城市污染物监测和FFE评估的适用性.

主要方法:

使用液体染色学-高分辨率质谱学 (LC-HRMS) 的疑似和非目标分析.
在雨水事件期间进行时间间隔采样,以捕捉污染物动态.
层次集群分析和网络分析用于数据解释和物质识别.

主要成果:

嫌疑人查初步确定了65种物质,其中38种物质通过非目标分析的in silico方法确定.
对于大多数初步识别的物质,观察到显著的第一次冲洗效应 (FFE).
SNTS揭示了各种污染物,经常错过了目标选,在最初的下水过程中进入城市水域.

结论:

疑似和非目标查 (SNTS) 是评估城市环境中新出现的微污染物的初冲效应 (FFE) 的一个强有力的方法.
城市雨水排放带有广泛的以前未被发现的污染物在最初的冲洗.
结果为有针对性的雨水监测和管理策略提供了宝贵的见解.

关键词:

相关性分析是一项相关性分析.第一个冲洗效应第一冲洗效应.网络分析网络分析非目标分析非目标分析城市风暴水城市风暴水.

更多相关视频

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

Published on: May 15, 2017

Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS

Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS

Published on: March 14, 2013

相关概念视频

Mass Spectrometry: Complex Analysis

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...

High-Performance Liquid Chromatography: Types of Detectors

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...