A beaker method for determination of microplastic concentration by micro-Raman spectroscopy

被引：2

作者：

Yang, Zijiang ^{[1
]}

Arakawa, Hisayuki ^{[1
]}

机构：

[1] Tokyo Univ Marine Sci & Technol, Dept Ocean Sci, Konan 4-5-7,Minato Ku, Tokyo 1088477, Japan

来源：

METHODSX | 2023年 / 11卷

关键词：

Raman spectroscopy; Microplastics; Small microplastic marine pollution; IDENTIFICATION; IMPACTS;

D O I：

10.1016/j.mex.2023.102251

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fourier-transform infrared (FT-IR) spectroscopy method for measuring small microplastic (SMP) concentration in marine environment is time-consuming and labor-intensive due to sample pre-treatment. In contrast, Raman spectroscopy is less influenced by water and can directly measure SMP samples in water, making it a more efficient method to measure SMP concentration. There-fore, a method that can directly estimate the concentration of SMPs in water was developed, and the relationship between SMP concentration and experimental Raman spectra were established by testing with standard polyethylene (PE) samples. It was found that average spectra acquired in water solution could reflect characteristic peaks of the plastic after baseline correction. Further investigation found that there is a significant functional relationship between correlation coefficient of sample spectra and the concentration of PE particles, and such relationship can be modelled by Langmuir model. The empirical functional relationships can be used to estimate SMP concentrations by measuring average Raman spectra. The developed methodology is helpful for developing rapid SMP identification and monitoring methods in a more complex manner. center dot A method of directly measuring MP concentration in water is proposed. center dot Experimental procedures are provided. center dot Data analysis methods are outlined.

引用

页数：12

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