Rapid Identification and Quantification of Microplastics in the Environment by Quantum Cascade Laser-Based Hyperspectral Infrared Chemical Imaging,Environmental Science & Technology

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Rapid Identification and Quantification of Microplastics in the Environment by Quantum Cascade Laser-Based Hyperspectral Infrared Chemical Imaging
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-11-25 , DOI: 10.1021/acs.est.0c05722
Sebastian Primpke ₁ , Matthias Godejohann ₂ , Gunnar Gerdts ₁

Affiliation

The monitoring of the emerging contaminant, microplastics, in the environment, in water supply, and for food safety is of major interest to science, consumers, and governments. While the chemical analysis of these particles is considered mandatory, a rapid and reliable method for the determination of particle sizes, shapes, and numbers is missing, as existing methods are not fitting into current laboratory measurement routines. In this study, we present an approach for circumventing these issues through the application of quantum cascade laser-based microscopy combined with an automated data analysis. This method allows the measurement of an area of 144 mm² in 36 min, with a pixel resolution of 4.2 μm, which is an appropriate timeframe and spatial resolution for routine measurements. The performance was compared to the existing state-of-the-art Fourier transform infrared microscopy analyses. Further, the application of the method on various environmental samples was investigated to examine its capacity to provide number and variety of present particles. The described analytical procedure overcomes the last restrictions for schedulable and rapid microplastic monitoring, resulting in a highly detailed data set for particle numbers, particle shapes, and polymer types.

中文翻译：

基于量子级联激光的高光谱红外化学成像技术快速鉴定和定量环境中的塑料

科学，消费者和政府对监视环境，供水，食品安全中新出现的污染物，微塑料的监视尤为重要。虽然这些颗粒的化学分析被认为是强制性的，但是由于现有方法不适合当前的实验室测量程序，因此缺少用于确定粒径，形状和数量的快速可靠的方法。在这项研究中，我们提出了一种通过应用基于量子级联激光的显微镜与自动数据分析相结合的方法来解决这些问题的方法。这种方法可以测量144 mm ²的面积在36分钟内完成，像素分辨率为4.2μm，这是常规测量的合适时间范围和空间分辨率。将该性能与现有的最新傅立叶变换红外显微镜分析进行了比较。此外，研究了该方法在各种环境样品上的应用，以检查其提供当前颗粒数量和种类的能力。所描述的分析程序克服了可调度和快速的微塑性监测的最后限制，从而获得了有关颗粒数量，颗粒形状和聚合物类型的高度详细的数据集。

更新日期：2020-12-15

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