基于显微拉曼面扫的小尺寸微塑料检测方法

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Abstract Due to the limitation of detection methods, there are few studies on the detection involved small-sized microplastics (<50μm). A method that can identify small-sized microplastics more accurately and efficiently without manual selection was proposed. Two kinds of suitable membranes were screened out as substrates for the separation and analysis of microplastics. The mapping mode of micro-Raman spectra was used to qualitatively and quantitatively detect five types of common microplastics. The results showed that this method can identify small-sized microplastics with the minimum particle size of 1μm from the background of the filter membrane and make pseudo color images to visualize the size, shape and type of microplastics. By simulating the impurities in the environmental samples with quartz sand particles, the method can also eliminate the influence of impurities and accurately locate the microplastics. The recovery rate of polystyrene microplastics with different particle sizes (5~50μm) was ranged from 33.3% to 79.0% under three concentration gradients.

Key words： microplastics small-sized micro-Raman spectra mapping visualization

Received: 01 March 2020

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X132

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	Articles by authors
	LIU Dan-tong
	SONG Yang
	LI Fei-fei
	CHEN Lyu-jun

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LIU Dan-tong,SONG Yang,LI Fei-fei等. A detection method of small-sized microplastics based on micro-Raman mapping[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(10): 4429-4438.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I10/4429

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