Laser & Optoelectronics Progress, Volume. 55, Issue 1, 13007(2018)
Degradation Ratio of Indigo Carmine Based on Absorption Spectroscopy
Figures & Tables(9)
Fig. 2. Absorption spectra of indigo carmine solution at different illumination durations
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
Table 1. Predictive residual of test set
View tableTable 1. Predictive residual of test set
True mass concentration / (mg·L-1) 5 15 25 35 45 55 65 75 Residual of absorbance prediction /(mg·L-1) -0.3263 -0.9520 -1.2795 -1.2617 0.0382 2.3803 3.6905 -1.6174 Residual of absorbance area prediction /(mg·L-1) -0.8354 -0.1144 -0.6149 -1.2291 -1.1178 0.2410 2.3186 -0.3257
Table 2. Relative error of indigo carmine mass concentration predicted by the absorption peak area-mass concentration prediction model
View tableTable 2. Relative error of indigo carmine mass concentration predicted by the absorption peak area-mass concentration prediction model
True mass concentration / (mg·L-1) Forecast mass concentration / (mg·L-1) Relative error /% 5 5.60 12.0 10 10.73 7.3 15 15.50 3.3 20 18.71 6.5 25 23.63 5.5 30 29.98 0.1 35 34.25 2.1 40 39.81 0.5 45 45.10 0.2 50 49.70 0.6 55 54.81 0.4 60 59.79 0.4 65 63.74 1.9 70 69.45 0.8 75 74.15 1.1 80 79.87 0.2 Relative error 2.7
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Zhang Xiaohe, Chen Guoqing, Ma Chaoqun. Degradation Ratio of Indigo Carmine Based on Absorption Spectroscopy[J]. Laser & Optoelectronics Progress, 2018, 55(1): 13007
Paper Information
Category: Spectroscopy
Received: Jun. 29, 2017
Accepted: --
Published Online: Sep. 10, 2018
The Author Email: Chen Guoqing (cgq2098@jiangnan.edu.cn)
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