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核磁共振光谱的适用性,以量化聚合物混合物中不同度的微塑料

Julia Schmidt¹, Marte Haave², Wei Wang^1,3

¹Department of Chemistry, University of Bergen 5007 Bergen Norway wei.wang@uib.no.

|April 24, 2025

概括

定量核磁共振 (qNMR) 光谱学显示出对环境样本中微塑料的分析具有前景. 这项研究证实了qNMR的存在.

科学领域:

分析化学分析化学
环境科学环境科学
材料科学材料科学材料科学

背景情况:

微塑料污染是一个日益严重的环境问题.
精确量化微塑料对于环境监测至关重要.
定量核磁共振 (qNMR) 光谱学为微塑料分析提供了潜力.

研究的目的:

研究qNMR用于分析合成聚合物混合物的可行性.
解决量化微塑料低度和不同度的挑战.
评估qNMR作为环境微塑料分析的可靠和成本效益高的方法.

主要方法:

使用qNMR进行聚合物混合物 (PS,PB,PI,PVC,PU,PLA) 的分析.
作为溶剂,使用了脱化 (CDCl3) 和四水 (THF-d8).
使用内部标准方法来测量聚合物度.

主要成果:

在低度下观察到特定聚合物 (PS,PVC,PB,PI) 的低相对误差.
在名义度和测量度之间的高线性 (R2 0.96550.9981),除了PU.
在中等度的THF-d8中有效同时量化六种聚合物.
观察到重叠的信号,可能掩盖低度聚合物.

结论:

qNMR显示了微塑料量化潜力,特别是在低度下.
由于信号重叠,在准确量化混合聚合物样本方面仍然存在挑战.
需要进一步的研究来提高环境微塑料分析的qNMR准确性.

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Applications Of NMR In Biology

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Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.