Zhang Xiaohe, Chen Guoqing, Ma Chaoqun. Degradation Ratio of Indigo Carmine Based on Absorption Spectroscopy[J]. Laser & Optoelectronics Progress, 2018, 55(1): 13007
- Laser & Optoelectronics Progress
- Vol. 55, Issue 1, 13007 (2018)
Fig. 1. Molecular structure of indigo carmine
Fig. 2. Absorption spectra of indigo carmine solution at different illumination durations
Fig. 3. Possible degradation process of indigo carmine
Fig. 4. Absorption spectra of indigo carmine solutions with different mass concentrations
Fig. 5. (a) Absorption-mass concentration prediction model at 611 nm; (b) peak area-mass concentration prediction model within 500-700 nm.
Fig. 6. Absorption spectra of mixed solution composed of newly mixed indigo carmine solution and degraded indigo carmine solution
Fig. 7. Degradation rate of indigo carmine at different illumination durations
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Table 1. Predictive residual of test set
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Table 2. Relative error of indigo carmine mass concentration predicted by the absorption peak area-mass concentration prediction model
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