期刊
JOURNAL OF ANALYTICAL CHEMISTRY
卷 77, 期 10, 页码 1282-1286出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1061934822100173
关键词
Raman spectroscopy; spectral processing; random forest; pattern recognition
资金
- Excellent Young Backbone Teachers of Blue Project in Jiangsu Universities in 2021
- National Natural Science Foundation of China [61602217, 61806177, 91746202]
- Natural Science Foundation of Zhejiang Province [LQ20C200004]
This study investigates and discusses an intelligent identification technology based on Raman spectroscopy for brand identification of soybean milk powder samples. By employing various spectral processing technologies, the recognition accuracy of these samples is significantly improved. Under the optimized conditions, the best recognition effect for soybean milk brand identification can be achieved, and the entire process is fast and convenient.
Raman spectroscopy can characterize the rich molecular vibration information of soybean milk powder samples, but difficulties arise in its direct use for sample classification and identification. Therefore, it is urgent to develop an intelligent identification technology based on Raman spectroscopy. For brand identification of soybean milk powder, this work investigates and discusses a variety of spectral processing technologies including wavelet denoising, normalization, principal component analysis, and the results show that appropriate spectral processing can improve the recognition accuracy of the random forest algorithm. Under the optimal conditions (db2 wavelet, normalization, principal component analysis, 30 decision trees), the best recognition effect of soybean milk brand identification can be achieved. The Raman spectral signal acquisition time of each sample is 40 s, and the spectra pretreatment and identification operation time only takes a few minutes. The analytical approach established in this paper has the advantages of convenient and fast Raman spectra acquisition, fast and accurate model identification.
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