Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy
Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy
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DOI：
10.1364/ao.393643
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发表时间：
2020-06-10
期刊：
影响因子：
1.9
通讯作者：
Thornton, Blair
中科院分区：
文献类型：
--
作者：
Takahashi, Tomoko;Liu, Zonghua;Thornton, Blair
提出了一种基于全息技术和拉曼光谱技术的非接触式塑料颗粒识别方法。使用直径为4 mm、波长为785 nm的准直连续波激光束照射位于20 cm水槽中的尺寸为3 mm的聚苯乙烯和聚（甲基丙烯酸甲酯）树脂粒料。使用相同的激光束拍摄颗粒的全息图像和拉曼光谱，以识别材料的形状、大小和成分。使用紧凑的系统，在大量的水中进行颗粒的形态和化学分析。该方法证明了在不收集和分离的情况下对水中微塑料进行非接触式连续原位监测的潜力。由The Optical Society根据Creative Commons Attribution 4.0 License条款发布。
A noncontact method to identify sparsely distributed plastic pellets is proposed by integrating holography and Raman spectroscopy in this study. Polystyrene and poly(methyl methacrylate) resin pellets with a size of 3 mm located in a 20 cm water channel were illuminated using a collimated continuous wave laser beam with a diameter of 4 mm and wavelength of 785 nm. The same laser beam was used to take a holographic image and Raman spectrum of a pellet to identify the shape, size, and composition of material. Using the compact system, the morphological and chemical analysis of pellets in a large volume of water was performed. The reported method demonstrates the potential for noncontact continuous in situ monitoring of microplastics in water without collection and separation. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.