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评估纯 PFAS 在受控设置下降的评估

Marco Mancini¹, Valentina Gioia¹, Federica Simonetti²

¹Department of Organic Micropollutants, Acea Elabori, Via Vitorchiano 165, 00191 Rome, Italy.

ACS measurement science au

|December 25, 2023

概括

此摘要是机器生成的。

聚或完全化基物质 (PFAS) 分析可以显示由于容器相互作用和矩阵效应的信号减少. 这项研究提出了技术程序,以减轻水样中的这些"永久化学物质"的低估.

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科学领域:

环境化学环境化学
分析化学分析化学
毒理学毒理学毒理学

背景情况:

聚和完全化基物质 (PFAS) 是自1940年以来广泛使用的持久性"永久化学品",具有环境和人类健康风险.
欧盟的法规旨在减少PFAS的使用,但其无处不在的存在需要先进的分析方法来有效监测.
新兴的PFAS化合物需要不断开发分析策略,以准确量化这些物质.

研究的目的:

在水性矩阵中分析聚和化基物质 (PFAS) 时调查信号下降的原因.
为实验室专家提出一个高效的技术程序,以解决PFAS的分析挑战.
为了减少在现实水样中低估PFAS度的风险.

主要方法:

使用液态染色体质谱法 (LC-MS) 分析30-PFAS混合物,包括受管制和新型化合物.
评估LC瓶材料 (玻璃与聚烯) 和溶剂 (水与水-甲醇),以评估PFAS吸附.
对分析温度和PFAS度影响的研究,时间范围为0-15小时.

主要成果:

在PFAS分析期间观察到的信号减少受到PFAS化学结构,链条长度和与瓶子材料的相互作用的影响.
PFAS对容器表面的吸附和潜在释放动态被确定为影响信号强度的关键因素.
特定的采样和处理程序可以减轻PFAS损失并提高分析准确性.

结论:

液晶瓶材料和溶剂的选择显著影响PFAS回收和分析准确性.
了解PFAS吸附和释放机制对于开发可靠的监测协议至关重要.
实施优化的采样和处理方法至关重要,以防止环境水样中的PFAS被低估.