HUANG Juan-juan,XIANG Wan-xin,XIA Jing-zhu,PAN Jian-bin.Classification of Blue Neutral Pens Using Machine Learning Aided Differential Raman Spectroscopy[J].Journal of Instrumental Analysis,2025,44(12):2526-2534.
This study employed differential Raman spectroscopy combined with machine learning to classify ink samples from 43 commercially available blue gel pens of different brands and models. Differential Raman spectra were first acquired to identify characteristic Raman peaks. Based on these spectral profiles,samples were manually categorized into four distinct groups. Subsequent classification using cluster analysis and random forest algorithms was compared against manual categorization. The random forest model achieved 90.00% classification accuracy. Differential Raman spectroscopy enables rapid,non-destructive analysis of blue gel pen inks. When integrated with random forest algorithms,it establishes an effective framework for efficient sample classification. The optimized random forest model significantly enhances both the speed and accuracy of identifying unknown ink compounds through differential Raman spectroscopy,demonstrating strong predictive capability for sample categorization.
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