Yande Liu, Xiuyang Du, Bin Li, Jun Hu, Jian Wu, Yilei Zheng. Detection of Benzoic Acid in Arrowroot by Terahertz Technology[J]. Laser & Optoelectronics Progress, 2019, 56(4): 041101
- Laser & Optoelectronics Progress
- Vol. 56, Issue 4, 041101 (2019)
Fig. 1. Structural diagram of terahertz time domain spectrometer
Fig. 2. Partial absorption coefficients of benzoic acid in arrowroot
Fig. 3. Absorption coefficients of benzoic acid in arrowroot with different mass fractions
Fig. 4. Scatter plot of benzoic acid content predicted by PLS
Fig. 5. RMSE versus principal component factor
Fig. 6. Spectra with or without plastic packaging when mass fraction of benzoic acid is 20%
Fig. 7. Scatter plot of benzoic acid content with plastic packaging predicted by PLS
Fig. 8. RMSE of sample with plastic packaging versus principal component factor
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Table 1. Mass fractions of benzoic acid in 36 groups of samples
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Table 2. Model results of benzoic acid content in arrowroot based on PLS
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Table 3. Model results of benzoic acid content in arrowroot with plastic packaging based on PLS
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