光子学报, 2020, 49 (3): 0330002, 网络出版: 2020-04-24 复制并引用该论文  被引通知

图 & 表

图 1. Design of detecting dissolved oxygen device based on frequency-domain fluorescence lifetime

Fig. 1. Design of detecting dissolved oxygen device based on frequency-domain fluorescence lifetime

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图 2. Structure of optical path

Fig. 2. Structure of optical path

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图 3. Flowchart for detecting dissolved oxygen by the means of single source frequency-domain fluorescence lifetime

Fig. 3. Flowchart for detecting dissolved oxygen by the means of single source frequency-domain fluorescence lifetime

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图 4. Detection principle of single light source phase modulation

Fig. 4. Detection principle of single light source phase modulation

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图 5. Fabrication of artificial fingers and fingerprints film

Fig. 5. Fabrication of artificial fingers and fingerprints film

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图 6. Calibration chart of the proposed method

Fig. 6. Calibration chart of the proposed method

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图 7. Fluorescence lifetime trend with temperature increase

Fig. 7. Fluorescence lifetime trend with temperature increase

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图 8. Comparison chart of instrument data

Fig. 8. Comparison chart of instrument data

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表 1溶解氧实测数据表

Table1. Results of dissolved oxygen concentration

O2:N2/% [O2]/(mg·L－1) θ1/(°) Δτ/μs τdo 21:79 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

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表 2误差分析

Table2. Error analysis

[O2]/(mg·L－1) τdo Test 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

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表 3检测结果分段分析

Table3. Segmentation analysis of experimental results

[O2]/(mg·L－1) Linear relationship |Δ|max/(mg·L－1) Error radio/% 0~5 [O2]=2.276×τdo－2.292 ≤|0.03| 0.6 5~9 [O2]=2.276×τdo－2.292 ≤|0.04| 0.5

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表 4稳定性和有效性检测

Table4. 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

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表 5响应时间检测表

Table5. Analysis of stability and effectiveness

Detection method The dissolved oxygen concentration to be detected A→B/s 0%→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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陈朋, 赵智, 赵冬冬, 韩洋洋, 梁荣华. 基于单光源频域荧光寿命的水体溶解氧浓度检测方法[J]. 光子学报, 2020, 49(3): 0330002. 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.