LIN Yun,ZHAI Sheng,ZHANG Jun,ZHAN Ying,PENG Yun-fa,LUO Hai-yan,LI Jun-xin.Research on Non Destructive Quantitative Detection Method of Nicotine Content in Tobacco Leaves on Site Using Handheld Near Infrared Spectrometer[J].Journal of Instrumental Analysis,2025,44(10):2107-2112.
LIN Yun,ZHAI Sheng,ZHANG Jun,ZHAN Ying,PENG Yun-fa,LUO Hai-yan,LI Jun-xin.Research on Non Destructive Quantitative Detection Method of Nicotine Content in Tobacco Leaves on Site Using Handheld Near Infrared Spectrometer[J].Journal of Instrumental Analysis,2025,44(10):2107-2112. DOI: 10.12452/j.fxcsxb.240830355.
Research on Non Destructive Quantitative Detection Method of Nicotine Content in Tobacco Leaves on Site Using Handheld Near Infrared Spectrometer
To improve the accuracy of nicotine content detection in tobacco leaves using a handheld near infrared spectrometer,an optimized quantitative detection method was proposed in this study. Firstly,spectral data from tobacco leaves was collected using the handheld near infrared spectrometer,followed by first derivative preprocessing. Then,nonlinear wavelength coefficients were extracted using the maximum information exploration method with non-parametric tests,and linear wavelength determination coefficients were obtained through linear regression. By combining correlation coefficient boundary decision threshold,wavelengths were grouped into linear and nonlinear bands using the multilayer perceptron algorithm,and predictive models were established for each band separately. Finally,the prediction results of each band were combined with different weight coefficients and compared with traditional full-spectrum partial least squares modeling. These results showed that the model based on combined bands achieved an increase of 6.57% in the correlation coefficient,a reduction of 26.05% in the mean absolute error,and a reduction of 28.11% in the mean relative error. This method significantly enhances model prediction accuracy,meeting the practical needs for rapid,accurate,and non-destructive detection of nicotine content in tobacco leaves using a handheld near infrared spectrometer.
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