Yuying Jiang, Guangming Li, Ming Lv, Hongyi Ge, Yuan Zhang. Determination of potassium sorbate and sorbic acid in agricultural products using THz time-domain spectroscopy[J]. Chinese Physics B, 2020, 29(9):
- Chinese Physics B
- Vol. 29, Issue 9, (2020)
Fig. 1. THz time-domain spectra of the PS and SA.
Fig. 2. Absorption coefficients and refractive indices of the (a) PS and (b) SA.
Fig. 3. THz absorption spectrum of PS and wheat/polyethylene mixture.
Fig. 4. THz absorption spectrum in SA and wheat/polyethylene mixtures.
Fig. 5. iPLS results for 12 subintervals in the absorption spectrum from PS.
Fig. 6. PSO fitness function for (a) PS and wheat mixtures, and (b) SA and wheat mixtures.
Fig. 7. Scatter plots of the predicted vs. actual value in (a) PS and wheat/PE mixture, and (b) SA and wheat/PE mixture with the PSO-SVC model.
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Table 1. Component of mixture.
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Table 2. iPLS wave screening results for 12 subintervals of the absorption spectrum from PS.
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Table 3. iPLS wave screening results for different subintervals of the PS spectra.
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Table 4. Prediction results with different PSO-SVC models.
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