Spectroscopy and Spectral Analysis, Volume. 40, Issue 11, 3443(2020)
Application Research of Normalization Algorithm Based on EWMA-PCA in Standardization of Water Quality Spectral Data
Figures & Tables(8)
Fig. 1. UV-Visible spectrum water quality detection system block diagram
Fig. 2. Spectra of 8 standard sample solutions measured under three spectrometers
(a) Hamamatsu C10082CAH spectrometer;(b): Ocean Maya 200Pro spectrometer;(c): Optosky ATP2000 spectrometer
Fig. 3. Water quality spectral data of 8 groups of potassium hydrogen phthalate solution
(a): COD 20 mg·L-1; (b): COD 40 mg·L-1; (c): COD 60 mg·L-1; (d): COD120 mg·L-1;(e): COD 160 mg·L-1; (f): COD 200 mg·L-1; (g): COD 400 mg·L-1; (h): COD 801 mg·L-1
Fig. 4. Three sets of comparison experiments to determine the normalized data of water absorption spectra of each concentration
(a): Comparison 1; (b): Comparison 2; (c): Comparison 3
Fig. 5. Standardized evaluation of water absorption spectra of each concentration measured by three sets of comparison experiments
(a): Correlation coefficient; (b): Variance; (c): Peak offset
Table 1. Standardized evaluation of water absorption spectrum data measured by C10082CAH and Maya2000Pro spectrometer
View tableView in ArticleTable 1. Standardized evaluation of water absorption spectrum data measured by C10082CAH and Maya2000Pro spectrometer
Concentration
/(mg·L-1)Correlation Coefficient Variance Peak offset/% Original Standardized Original Standardized 20 0.994 229 0.994 229 0.098 594 0.001 016 0.010 8 40 0.990 752 0.990 766 0.131 140 0.001 903 0.035 4 60 0.986 116 0.986 128 0.161 782 0.003 592 0.002 8 120 0.989 171 0.989 173 0.239 228 0.004 028 0.097 7 160 0.991 622 0.991 623 0.252 841 0.003 540 0.006 6 200 0.991 255 0.991 256 0.256 969 0.003 659 0.073 6 400 0.985 524 0.985 524 0.286 155 0.005 789 0.009 5 800 0.982 170 0.982 170 0.305 703 0.006 357 0.070 9
Table 2. Standardized evaluation of water absorption spectrum data measured by C10082CAH spectrometer and ATP2000 spectrometer
View tableView in ArticleTable 2. Standardized evaluation of water absorption spectrum data measured by C10082CAH spectrometer and ATP2000 spectrometer
Concentration
/(mg·L-1)Correlation Coefficient Variance Peak offset/% Original Standardized Original Standardized 20 0.991 321 0.991 437 0.107 919 0.001 462 0.010 6 40 0.992 446 0.992 460 0.145 516 0.001 786 0.031 7 60 0.989 650 0.989 674 0.162 702 0.003 006 0.011 4 120 0.989 949 0.990 001 0.210 102 0.004 373 0.054 0 160 0.993 332 0.993 381 0.210 997 0.003 653 0.029 0 200 0.994 065 0.994 107 0.205 069 0.003 262 0.029 0 400 0.992 017 0.992 058 0.209 195 0.003 576 0.032 3 800 0.990 767 0.990 820 0.198 635 0.003 291 0.000 5
Table 3. Standardized evaluation of water absorption spectrum data measured by Maya2000Pro and ATP2000 spectrometer
View tableView in ArticleTable 3. Standardized evaluation of water absorption spectrum data measured by Maya2000Pro and ATP2000 spectrometer
Concentration
/(mg·L-1)Correlation Coefficient Variance Peak offset/% Original Standardized Original Standardized 20 0.995 236 0.995 267 0.001 574 0.000 841 0.021 5 40 0.995 680 0.995 707 0.003 461 0.000 823 0.003 7 60 0.995 278 0.995 304 0.004 107 0.001 005 0.014 2 120 0.995 401 0.995 418 0.006 540 0.001 301 0.043 7 160 0.995 752 0.995 765 0.007 556 0.001 338 0.022 4 200 0.995 540 0.995 550 0.009 044 0.001 494 0.044 6 400 0.994 192 0.994 200 0.013 650 0.002 087 0.022 8 800 0.991 849 0.991 857 0.022 398 0.003 049 0.003 7
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Si-han ZHOU, Xin-yu HU, Bin TANG, Ming-fu ZHAO, Feng-xiao LI, Ren-jie WANG, Qi-sen XIAO, Yu XIAO. Application Research of Normalization Algorithm Based on EWMA-PCA in Standardization of Water Quality Spectral Data[J]. Spectroscopy and Spectral Analysis, 2020, 40(11): 3443
Paper Information
Category: Research Articles
Received: Oct. 16, 2019
Accepted: --
Published Online: Jun. 18, 2021
The Author Email: Si-han ZHOU (631694566@qq.com)
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