Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy

Takahashi Tomoko; Liu Zonghua; Thevar Thangavel; Burns Nicholas; Mahajan Sumeet; Lindsay Dhugal John; Watson John; Thornton Blair

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Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy

机译：综合全息术和拉曼光谱法鉴定大量水量中的微塑料

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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.

机译：通过在本研究中整合全息和拉曼光谱来提出识别稀疏分布塑料颗粒的非接触式方法。使用直径为4mm和波长为785nm的直径为4mm的准直连续波激光束，照射具有位于20cm水通道中的3mm尺寸的聚苯乙烯和聚苯乙烯（甲基丙烯酸甲酯）树脂颗粒。相同的激光束用于采用颗粒的全息图像和拉曼光谱以识别材料的形状，尺寸和组成。使用紧凑的系统，进行大量水粒的颗粒的形态学和化学分析。报告的方法证明了在没有收集和分离的情况下对水中微薄塑料的不接触的潜力。光学社会根据创意公约归因于4.0许可的条款发布。

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《Applied optics》 |2020年第17期|共6页
作者
Takahashi Tomoko; Liu Zonghua; Thevar Thangavel; Burns Nicholas; Mahajan Sumeet; Lindsay Dhugal John; Watson John; Thornton Blair;
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Japan Agcy Marine Earth Sci &

Technol JAMSTEC Adv Sci Technol Res Program ASTER 2-15 Natsushima Cho Yokosuka Kanagawa 2370061 Japan;

Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

Univ Aberdeen Sch Engn Aberdeen AB24 3UE Scotland;

Univ Aberdeen Sch Engn Aberdeen AB24 3UE Scotland;

Univ Southampton Dept Chem Southampton SO17 1BJ Hants England;

Japan Agcy Marine Earth Sci &

Technol JAMSTEC Adv Sci Technol Res Program ASTER 2-15 Natsushima Cho Yokosuka Kanagawa 2370061 Japan;

Univ Aberdeen Sch Engn Aberdeen AB24 3UE Scotland;

Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

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Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy

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