微塑料的检测通过一个共聚焦显微镜空间异质拉曼光谱仪与等级格子
Fuguan Li1, Nan Song2, Xiaotian Li1
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Research Center for Diffraction Gratings Manufacturing and Application, Changchun, Jilin 130033, China.
一个新的共聚焦显微镜与格格的空间异质拉曼光谱仪 (CM-ESHRS) 结合,可提供高效的微塑料检测. 该方法提供了高信号噪声比和光谱分辨率,用于分析各种微塑料.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 频谱学是一种光谱学.
背景情况:
- 微塑料污染是一个重大的全球环境问题.
- 拉曼光谱是实时,非破坏性的微塑料分析的宝贵工具.
- 传统的方法存在弱信号和低信号噪声比 (SNR).
研究的目的:
- 开发一种高效可靠的微塑料检测方法.
- 为了增强微塑料拉曼光谱中的信号强度和光谱分辨率.
- 为了对各种微塑料的振动光谱带进行分类.
主要方法:
- 一个共聚焦显微镜的构造与一个格格的空间异质拉曼光谱仪 (CM-ESHRS) 结合起来.
- 利用共聚焦显微镜和等级格子特征,实现高光通量,SNR,光谱分辨率和宽光谱检测带.
- 频谱校准实现了大约0.67厘米-1的分辨率和每次1372.16厘米-1的检测范围.
主要成果:
- 成功检测和分析了19种类型的微塑料,包括聚胺,聚烯和聚甲基甲酸.
- 与商业散射光谱仪相比,已经证明了高光学吞吐量.
- 获得了各种尺寸的微塑料的完整光谱信息,混合在食品矩阵 (面粉) 和混合材料条件下.
结论:
- CM-ESHRS系统为微塑料检测提供了一种高效可靠的方法.
- 开发的方法克服了传统技术的局限性,提供了改进的SNR和光谱分辨率.
- 在微塑料的识别和分析中,CM-ESHRS显示出各种应用的巨大潜力.
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