US EPA 方法 537.1 是一种固相萃取 (SPE) 液相色谱/串联质谱 (LC/MS/MS) 方法,用于分析饮用水中的 18 种选定 PFAS,包括 PFOS 和 PFOA。多反应监测 (MRM) 可用于提高选择性,定量依赖于内标校正。该方法使用 Agilent Bond Elut LMS SPE 柱提取饮用水样品中的 PFAS。
US EPA changes PFAS rule after signingdoi:10.1021/cen-09831-polcon4Britt E. EricksonChemical & Engineering News
“Our PFAS Strategic Roadmap marshals the full breadth of EPA’s authority and resources to protect people from these harmful forever chemicals,” announced EPA Administrator Michael Regan, in a statement to media. “Today, I am proud to finalize this critical piece of our Roadmap, and in ...
PFAS have increasingly been detected in PWSs as analytical sensitivity has improved and testing has become more widespread. In the third round of EPA’s Unregulated Contaminant Monitoring Rule (UCMR3) in 2013–2015, which included six (mainly legacy) PFAS compounds, only 4% of PWSs reported de...
Two US-based testing programs—the Toxicity Testing in the 21st Century (Tox21) Federal Consortium and the EPA Toxicity Forecaster (ToxCast) project—have together evaluated over 8000 chemical substances across hundreds of bioassays [3,4,5]. Efforts are underway to map the derived bioactivity ...
The US EPA characterizes an adverse effect as any “biochemical change, functional impairment, or pathologic lesion that affects the performance of the whole organism, or reduces an organism’s ability to respond to an additional environmental challenge” [37]. Other international regulatory agencies ...
The ENERGY STAR Challenge for Industry calls upon businesses to create a five-year plan to reduce energy intensity by 10% or more. Companies that publically join the Challenge and meet the goal are recognized by the US EPA for their efforts, and gain the right to capitalize...
EPA to Ban Chlorpyrifos Use on Food Crops The pesticide chlorpyrifos has been widely used on crops like soybeans, fruit and nut trees, broccoli and cauliflower since 1965. It has been linked to neurological problems in children. Cecelia Smith-SchoenwalderAug. 18, 2021 ...
We urge Congress to give sufficient time for experts at DoD and EPA to implement those provisions and the measures identified in EPA’s new PFAS Roadmap. DoD also recognized that going outside the regulatory process can result in unintended consequences, as reflected in the September 21, ...
喝开水,真的有用 | 分享一篇和日常生活高度相关的一篇科研文章。该文10月发表在 ACS ES and T Water. 该文研究了影响饮用水中全氟和多氟烷基物质(PFAS)浓度的因素,并评估了人类的暴露风险。 结果显示,八氟辛酸和八氟辛烷磺酸(PFOS)是最常见的PFAS。中国自来水中的PFAS浓度显著高于英国,超过了美国环境保护署(...