A critical assessment of visual identification of marine microplastic using Raman spectroscopy for analysis improvement
A critical assessment of visual identification of marine microplastic using Raman spectroscopy for analysis improvement
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DOI：
10.1016/j.marpolbul.2015.09.026
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发表时间：
2015-11-15
影响因子：
5.8
通讯作者：
Nielsen, Torkel Gissel
中科院分区：
文献类型：
--
作者：
Lenz, Robin;Enders, Kristina;Nielsen, Torkel Gissel
微塑料（MP）的鉴定和表征是评价其浓度、化学成分及其与生物群相互作用的必要步骤。同时对欧洲和北大西洋副热带海面下过滤的MP >= 10 μ m直径进行了肉眼显微镜和拉曼显微光谱鉴定。视觉识别的小于100 μ m的颗粒的拉曼确认率明显低于较大的颗粒，这表明单独的视觉识别不适用于小型微塑料的研究。68%的目测MP （n = 1279）经光谱证实为塑料。百分比随MP的类型、颜色和大小而变化。纤维的成功率（75%）高于颗粒（64%）。我们测试了拉曼显微光谱在不同化学成分（添加剂）、降解状态和有机物质涂层方面对MP鉴定的适用性。部分紫外线降解的消费后塑料为海洋MP中最常见的聚合物（即聚乙烯和聚丙烯）提供了可识别的拉曼光谱。(C) 2015 Elsevier Ltd.版权所有。
Identification and characterisation of microplastic (MP) is a necessary step to evaluate their concentrations, chemical composition and interactions with biota. MP >= 10 mu m diameter filtered from below the sea surface in the European and subtropical North Atlantic were simultaneously identified by visual microscopy and Raman micro-spectroscopy. Visually identified particles below 100 mu m had a significantly lower percentage confirmed by Raman than larger ones indicating that visual identification alone is inappropriate for studies on small microplastics. Sixty-eight percent of visually counted MP (n = 1279) were spectroscopically confirmed being plastic. The percentage varied with type, colour and size of the MP. Fibres had a higher success rate (75%) than particles (64%). We tested Raman micro-spectroscopy applicability for MP identification with respect to varying chemical composition (additives), degradation state and organic matter coating. Partially UV-degraded post-consumer plastics provided identifiable Raman spectra for polymers most common among marine MP, i.e. polyethylene and polypropylene. (C) 2015 Elsevier Ltd. All rights reserved.