Raman spectrum quantitative analysis method and system based on spectrum peak height direct extraction

A quantitative analysis and Raman spectroscopy technology, which is applied in the field of spectral detection and spectral analysis, can solve the problems of differences in detection results and low precision, achieve high quantitative analysis precision, reduce the steps of increasing errors, and avoid the effect of background subtraction steps

Active Publication Date: 2021-07-13
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing Raman spectrum analysis method has large differences in detection results and low precision when the spectrum shape changes, and provides a Raman spectrum quantitative analysis method based on direct extraction of spectral peak heights and system

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  • Raman spectrum quantitative analysis method and system based on spectrum peak height direct extraction
  • Raman spectrum quantitative analysis method and system based on spectrum peak height direct extraction
  • Raman spectrum quantitative analysis method and system based on spectrum peak height direct extraction

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Embodiment Construction

[0040] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Raman spectroscopy combined with laser technology can easily achieve quantitative analysis of substances. The existing Raman quantitative analysis method needs to perform background subtraction, and then perform quantitative analysis according to the peak area of ​​the Raman peak. The current automated background subtraction algorithm is based on the spectral shape of the Raman spectrum. If the spectral shape changes, many errors may occur, resulting in a decrease in the accuracy of the Raman spectral quantitative analysis system. Based on this, the present invention provides a method and system for quantitative analysis of Raman spectra based on direct extraction of spectral peak heights. The analysis system can improve the precision of the Raman spectroscopy quantitative analysis system.

[0042] Such as fig...

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Abstract

The invention provides a Raman spectrum quantitative analysis method and system based on spectrum peak height direct extraction, and solves the problems of large detection result difference and low precision of the existing Raman spectrum analysis method when the spectrum shape changes. According to the method and the system, background deduction is not needed, and therefore, the precision of the Raman spectrum quantitative analysis system can be improved. The method comprises the following steps: 1, collecting a Raman light signal passing through a sample, and processing the Raman light signal into a digital signal; 2, carrying out singular point noise removal processing on the target substance signal processed in the step 1; 3, performing peak height extraction processing on the signals processed in the step 2; 4, repeating the data processing processes in the step 2 and the step 3, and performing the same processing on the reference substance to obtain a peak height signal of the reference substance; 5, carrying out normalization processing on the peak height signal; and 6, carrying out quantitative analysis on the signal processed in the step 5 to obtain a sample quantitative analysis result.

Description

technical field [0001] The invention belongs to the field of spectrum detection and spectrum analysis, in particular to a Raman spectrum quantitative analysis method and system based on direct extraction of spectrum peak heights. Background technique [0002] Raman spectroscopy detection technology is a kind of spectral detection technology, which has been widely used because of its relatively simple light source, good ability to identify substances, and no complicated processing of samples. Existing portable Raman spectroscopy equipment can be used directly on samples without any treatment, making it widely used in various fields such as mineral prospecting, drug detection, and food detection. [0003] Existing Raman spectral analysis methods generally require background subtraction first, and then spectral analysis. Most of the automated background subtraction algorithms are designed according to the spectral shape of the Raman spectrum, for example, polynomial fitting me...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 周淼淼聂荣志高飞王鹏飞彭波
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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