通过燃烧离子染色学方法确定复杂样品中的有机化合物含量:定义"总和多基物质 (PFAS) "参数的一种方法?
Babatoundé I T Idjaton1, Anne Togola2, Jean Philippe Ghestem2
1BRGM, Direction Eau Environnement Procédés et Analyses, 3 av. Claude-Guillemin - BP 36009, 45060 Orléans, France; Université Paris Cité, Institut de physique du globe de Paris, CNRS, F-75005 Paris, France.
The Science of the total environment
|April 24, 2024
概括
使用燃烧离子色谱 (CIC) 的新方法分析环境样本中的和多基物质 (PFAS). 虽然有效测量可提取的有机 (EOF) 和可吸附的有机 (AOF),但这些技术不能完全捕捉PFAS总污染.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
背景情况:
- 新出现的污染物,特别是和多基物质 (PFAS),对环境和公共健康造成了重大关注.
- 通常被称为"永恒化学品"的PFAS在环境中持久,存在于复杂的矩阵中.
研究的目的:
- 开发和验证基于燃烧离子染色学 (CIC) 的全球分析方法,以评估PFAS污染.
- 为了确定可提取的有机 (EOF) 和可吸附的有机 (AOF),作为总体PFAS水平的指标.
- 评估基于CIC的方法的有效性,并将其与像LC-MS/MS这样的有针对性的分析进行比较.
主要方法:
- 燃烧离子色谱 (CIC) 方法的开发,用于确定EOF和AOF.
- 研究影响AOF测量的因素,包括pH值,溶解的有机碳和悬浮颗粒.
- 一个清洗步骤的验证,以去除在样本中高达8 mgF.L-1的无机 (IF).
- 在复杂的环境矩阵上测试CIC方法,评估可重复性和可重复性.
主要成果:
- 基于CIC的方法证明了复杂环境样本的良好重复性和可重复性.
- AOF和EOF分析分别占有123%和0.12%的总有机 (TOF).
- PFAS,表示为,解释了TOF的0.211% (AOF) 和0.0035% (EOF).
- 很大一部分化化合物没有被EOF或AOF捕获,这表明通过挥发或非可提取/不可吸收的分数损失.
结论:
- 虽然使用CIC进行的EOF和AOF测量为PFAS污染提供了有价值的见解,但它们并不是总PFAS评估的完全有效代理.
- 该研究强调了非可提取和不可吸附的化化合物的存在,这表明了目前用于全面PFAS监测的分析方法的局限性.
- 基于CIC的方法对于了解PFAS的来源和环境命运是有用的,但需要进一步研究才能完全了解污染情况.
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