Yao-qiang HU, Min GUO, Xiu-shen YE, Quan LI, Hai-ning LIU, Zhi-jian WU. Indirect Determination of Liquor Alcohol Content Based on Near-Infrared Spectrophotometry[J]. Spectroscopy and Spectral Analysis, 2022, 42(2): 410
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 2, 410 (2022)
Fig. 1. Effect of optical distance on ultraviolet-visible-near infrared spectral images of water
Fig. 2. Effect of optical distance on ultraviolet-visible-near infrared spectral images of ethanol
Fig. 3. Near-infrared spectral images of ethanol aqueous solutions
Fig. 4. Absorbance fitting curves of ethanol aqueous solutions at 1 448 nm
(a): 0~100%; (b): 20%~80%
(a): 0~100%; (b): 20%~80%
Fig. 5. Absorption spectra of some brand liquors (a) and bulk liquors (b)
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Table 1. Absorbances of water at 1 448 nm with different optical distances
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Table 2. Absorbances of ethanol at 1 448 nm with different optical distances
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Table 3. Absorbances of ethanol aqueous solutions with different mass ratios at 1 448 nm
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Table 4. Absorbance values of ethanol obtained by measurement repeated 6 times
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Table 5. Predicted results of verified sample
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