Acta Photonica Sinica, Volume. 49, Issue 3, 0330002(2020)
Detection Method of Dissolved Oxygen Concentration in Water Based on Single Source Frequency Domain Fluorescence Lifetime
Figures & Tables(13)
Fig. 1. Design of detecting dissolved oxygen device based on frequency-domain fluorescence lifetime
Fig. 3. Flowchart for detecting dissolved oxygen by the means of single source frequency-domain fluorescence lifetime
Fig. 4. Detection principle of single light source phase modulation
Table 1. Results of dissolved oxygen concentration
View tableView in ArticleTable 1. Results of dissolved oxygen concentration
O2:N2/% [O2]/(mg·L－1) θ 1/(°)Δ τ /μsτ do21:79 8.963 －69.125 33.107 5.152 10:90 4.296 －71.180 27.193 4.944 5:95 2.062 －73.820 19.698 2.901 1:99 0.404 －78.388 6.916 1.903 0.01:99.99 0.033 －80.532 0.956 1.200 0:100 0.008 －80.876 0 1.024
Table 2. Error analysis
View tableView in ArticleTable 2. Error analysis
[O2]/(mg·L－1) τ doTest results/(mg·L－1) Deviation/(mg·L－1) 8.963 4.944 8.960 －0.003 4.296 2.901 4.309 0.013 2.062 1.903 2.039 －0.023 0.404 1.200 0.438 0.034 0.033 1.024 0.037 0.004 0.008 1.000 －0.017 －0.025
Table 3. Segmentation analysis of experimental results
View tableView in ArticleTable 3. Segmentation analysis of experimental results
[O2]/(mg·L－1) Linear relationship | Δ |max/(mg·L－1)Error radio/% 0~5 [O2]=2.276× τ do－2.292≤| 0.03 |0.6 5~9 [O2]=2.276× τ do－2.292≤| 0.04 |0.5
Table 4. Analysis of stability and effectiveness
View tableView in ArticleTable 4. Analysis of stability and effectiveness
Detection method Measurements/(mg·L－1) Average value/(mg·L－1) Standard deviation/(mg·L－1) Relative standard deviation/% 1 2 3 4 5 DOP1 sensor 4.250 4.242 4.254 4.233 4.263 4.248 0.011 0.27 Proposed method 4.224 4.226 4.235 4.242 4.233 4.232 0.007 0.18
Table 5. Analysis of stability and effectiveness
View tableView in ArticleTable 5. Analysis of stability and effectiveness
Detection method The dissolved oxygen concentration to be detected A →B /s0%→21%(90%) 21%→0%(90%) 0%→21%(95%) 21%→0%(95%) DOP1 sensor 35 36 43 45 Proposed method 21 26 23 37
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Peng CHEN, Zhi ZHAO, Dong-dong ZHAO, Yang-yang HAN, Rong-hua LIANG. Detection Method of Dissolved Oxygen Concentration in Water Based on Single Source Frequency Domain Fluorescence Lifetime[J]. Acta Photonica Sinica, 2020, 49(3): 0330002
Paper Information
Category: Spectroscopy
Received: Nov. 23, 2019
Accepted: Jan. 13, 2020
Published Online: Apr. 24, 2020
The Author Email: ZHAO Dong-dong (zhaodd@zjut.edu.cn)
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