相关实验视频

Updated: Jun 16, 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

关于和多基基物质 (PFAS) 的苏黎世II声明:科学和监管需求

Jamie C DeWitt¹, Juliane Glüge², Ian T Cousins³

¹Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis 97331, Oregon, United States.

Environmental science & technology letters

|August 19, 2024

概括

科学家和监管机构举行会议,讨论对和多醇基物质 (PFAS). 在了解PFAS对健康的影响和监管行动方面取得了进展,但需要更多的全球数据和多样化的参与.

科学领域:

环境化学环境化学
毒理学毒理学毒理学
监管科学监管科学

背景情况:

和多基基物质 (PFAS) 是合成化学品,具有全球环境和健康问题.
2022年苏黎世研讨会召集国际专家,评估自2017年以来对PFAS的科学和监管进展.

研究的目的:

审查过去五年来PFAS科学和政策的进展.
确定正在进行的关键问题,并提出研究和监管的未来方向.
促进在PFAS挑战方面的国际合作.

主要方法:

这是一个混合式的研讨会形式,涉及来自18个国家的36名科学家和监管机构.
从研讨会讨论和见解的审查和综合.
分析了解PFAS对健康的影响,排放,分析方法和监管方法的进展情况.

主要成果:

在了解PFAS对人类健康的影响方面取得了重大进展.
在全球范围内,PFAS的监管准则正在下降.
需要加强全球关于PFAS排放和污染水平的数据.
分析方法正在改进,但范围仍然有限 (覆盖约50个PFAS).
关于将PFAS分组为监管目的的讨论日益增长.

结论:

了解PFAS对人类健康的影响的持续显著发展.
持续需要对PFAS污染进行更广泛的全球监测.
分析技术的进步对于全面的PFAS评估至关重要.
监管策略正在发展,有建议限制许多PFAS的使用.
加强国际合作和多元化的参与对于未来的PFAS研究和政策至关重要.

更多相关视频

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

相关概念视频

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.

Halogens

Halogens

Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group.

Alkyl Halides

Alkyl Halides

Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...