新的提取方法和化合物特异性同位素分析环境水中的甲氧化和含水层泥样本
Martí Vinyes-Nadal1, Jérémy Masbou2, Steffen Kümmel3
1Grup MAiMA, SGR Mineralogia Aplicada, Geoquímica i Hidrogeologia (MAGH), Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Ciències de la Terra, Institut de Recerca de l'Aigua (IdRA), Universitat de Barcelona (UB), Martí i Franquès s/n, 08028 Barcelona, Spain.
The Science of the total environment
|May 7, 2024
概括
这项研究引入了多元素化合物特定的稳定同位素分析 (ME-CSIA),用于追踪昆虫杀虫剂甲基及其在环境中的代谢物. 开发的方法可以精确监测这些持久有机污染物,有助于了解它们在土壤和地下水中的行为.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 同位素地球化学 同位素地球化学
背景情况:
- 像甲氧化这样的持久有机污染物对环境构成风险,需要先进的监测技术.
- 多元化合物特定稳定同位素分析 (ME-CSIA) 是跟踪污染物的命运和转变的强大工具.
- ME-CSIA对极性有机农药的应用,如甲氧化,仍然在很大程度上未被探索.
研究的目的:
- 开发和验证双碳和化合物特定的稳定同位素分析方法 (δ13C-CSIA和δ37Cl-CSIA) 的甲氧化及其代谢物,甲氧化olefin.
- 建立高效的提取和预缩技术,以分析这些化合物在环境相关的度.
- 评估使用极地有机化学集成样本 (POCIS) 与CSIA一起用于环境监测的可行性.
主要方法:
- 开发具有高灵敏度和精度的双碳和同位素分析以检测甲氧化和甲氧化烯.
- 三种提取技术的优化:固相提取 (SPE),液体固体提取 (LSE) 和POCISs.
- 使用水和含水层泥样本验证方法,评估准确性和潜在分离.
主要成果:
- 实现了高灵敏度 (10-100 mg/L) 和精度 (≤0.3 ‰为 δ13C,≤0.5 ‰为 δ37Cl) 的ME-CSIA的甲氧化及其代谢物.
- SPE和LSE证明了从环境矩阵中高精度地有效提取这两种化合物.
- POCIS-CSIA显示微小的分化,尽管最初的部署显示了由于分析剂-吸收剂相互作用的临时同位素效应.
结论:
- 这项研究提供了一个概念证明,用于将ME-CSIA应用于甲氧化及其代谢物.
- 开发的分析和提取方法适用于在受污染的环境中调查甲氧化的来源和转化途径.
- 了解分析剂-吸收剂相互作用对于优化环境监测中的被动采样技术至关重要.
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