The development of effective remedial technologies for the destruction of environmental pollutants requires the ability to clearly monitor degradation processes. NMR spectroscopy is a powerful tool for understanding reaction progress, however practical considerations often restrict the application of NMR spectroscopy as a tool to better understand the degradation of environmental pollutants. Chief among these restrictions is the limited access smaller environmental research labs and remediation companies have to suitable NMR facilities. Benchtop NMR spectroscopy is a low-cost and user-friendly approach to acquire much of the same information as conventional NMR spectroscopy, albeit with reduced sensitivity and resolution. This paper explores the practical application of benchtop NMR spectroscopy to understand the degradation of perfluorooctanoic acid using sodium persulfate, a common reagent for the destruction of groundwater contaminants. It is found that Benchtop 19 F NMR spectroscopy is able to monitor the complete degradation of perfluorooctanoic acid into fluoride, however the observation of intermediate degradation products formed, which can be observed using a conventional NMR spectrometer, cannot be readily distinguished from the parent compound when measurements are performed using the benchtop instrument. Under certain reaction conditions the formation of fluorinated structures that are resistant to further degradation are readily observed. Overall, it is shown that benchtop 19 F NMR spectroscopy has potential as a quick and reliable tool to assist in the development of remedial technologies for the degradation of fluorinated contaminants.

中文翻译：

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台式 19 F 核磁共振光谱作为测试全氟辛酸降解补救技术的实用工具，一种持久性有机污染物

开发用于破坏环境污染物的有效补救技术需要能够清楚地监测降解过程。核磁共振波谱是了解反应进程的有力工具，但实际考虑往往限制了核磁共振波谱作为更好地了解环境污染物降解的工具的应用。其中最主要的限制是较小的环境研究实验室和修复公司对合适的核磁共振设施的访问受限。台式 NMR 光谱是一种低成本且用户友好的方法，可以获取与传统 NMR 光谱相同的大部分信息，但灵敏度和分辨率有所降低。本文探讨了台式核磁共振光谱的实际应用，以了解使用过硫酸钠（一种用于破坏地下水污染物的常用试剂​​）降解全氟辛酸。发现台式 19 F NMR 光谱能够监测全氟辛酸完全降解为氟化物的过程，但是在使用常规 NMR 光谱仪时，所形成的中间降解产物的观察结果无法与母体化合物轻易区分。使用台式仪器进行测量。在某些反应条件下，容易观察到抗进一步降解的氟化结构的形成。全面的，