Typical Raman Spectroscopy Ttechnology and Research Progress in Agriculture Detection

doi:10.12133/j.smartag.SA202201013

Abstract

Abstract:

Raman spectroscopy is a type of scattering spectroscopy with features such as rapid, less susceptible to moisture interference, no sample pre-treatment and in vivo detection. As a powerful characterization tool for analyzing and testing the molecular composition and structure of substances, Raman spectroscopy is also playing an extremely important role in the detection of plant and animal phenotypes, food safety, soil and water quality in the agricultural field with the continuous improvement of Raman spectroscopy technology. In this paper, the detection principles of Raman spectroscopy are introduced, and the new progresses of eight Raman spectroscopy technology are summarized, including confocal microscopy Raman spectroscopy, Fourier transform Raman spectroscopy, surface-enhanced Raman spectroscopy, tip-enhanced Raman spectroscopy, resonance Raman spectroscopy, spatially shifted Raman spectroscopy, frequency-shifted excitation Raman difference spectroscopy and Raman spectroscopy based on nonlinear optics, etc. And their advantages and disadvantages and application scenarios are prerented, respectively. The applications of Raman spectroscopy in plant detection, soil detection, water quality detection, food detection, etc. are summarized. It can be specifically subdivided into plant phenotype, plant stress, soil pesticide residue detection, soil colony detection, soil nutrient detection, food pesticide detection, food quality detection, food adulteration detection, and water quality detection. In future agricultural applications, the elimination of fluorescence background due to complex living organisms in Raman spectroscopy is the next research direction. The study of stable enhanced substrates is an important direction in the application of Surface Enhanced Raman Spectroscopy (SERS). In order to meet the measurement of different scenarios, portable and telemetric Raman spectrometers will also play an important role in the future. Raman spectroscopy needs to be further explored for a wide variety of research objects in agriculture, especially for applications in animal science, for which there is still a paucity of relevant studies up to now. In the existing field of agricultural research, it is necessary to pursue the characterization of more specific substances by Raman spectroscopy, which can prompt the application of Raman spectroscopy for a wider range of uses in agriculture. Further, the pursuit of lower detection limits and higher stability for practical applications is also the direction of development of Raman spectroscopy in the field of agriculture. Finally, the challenges that need to be solved and the future development directions of Raman spectroscopy are proposed in the field of agriculture in order to bring more inspiration to future agricultural production and research.

Key words: Raman spectroscopy, plant phenotyping, plant stress detection, soil detection, pesticide residue detection, water quality detection, food detection

CLC Number:

O657.37

GAO Zhen, ZHAO Chunjiang, YANG Guiyan, DONG Daming. Typical Raman Spectroscopy Ttechnology and Research Progress in Agriculture Detection[J]. Smart Agriculture, 2022, 4(2): 121-134.

Figures/Tables 2

References 92

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拉曼技术类别	优点	缺点
共聚焦显微拉曼光谱	可成像分析，高空间分辨率	可见光波段有荧光背景，体积大
傅里叶变换拉曼光谱	减少荧光干扰，提高信号强度	温度漂移
移频激发拉曼差分光谱	无荧光干扰	需双激光激发
空间位移拉曼光谱	可无损伤测量样品内部化学信息	需激发光和采集光偏移的光路系统
表面增强拉曼光谱	高灵敏度，低检测限	定量性和稳定性差
共振拉曼光谱	高灵敏度	荧光干扰
针尖增强拉曼光谱	高灵敏度，纳米级空间分辨率，低检测限	稳定性差
受激拉曼光谱	提高信噪比和信号强度，成像速度快	技术复杂
相干反斯托克斯拉曼光谱	高灵敏度	技术复杂

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