Mengdi Tu, Gaofang Yin, Nanjing Zhao, Zhisong Qin, Xiang Wang, Ming Dong, Jianguo Liu, Wenqing Liu. Detection Method of Dissolved Oxygen Concentration in Water Based on Time-Domain Fluorescence Lifetime[J]. Acta Optica Sinica, 2018, 38(10): 1001005
- Acta Optica Sinica
- Vol. 38, Issue 10, 1001005 (2018)
Fig. 1. Time-domain fluorescence lifetime dissolved oxygen measurement system. (a) Schematic diagram; (b) picture of real products
Fig. 2. Fluorescent signals under different excitation light intensities. (a) Original fluorescence measurement curve; (b) normalized fluorescence quenching curve
Fig. 3. Fluorescent signals at different excitation durations. (a) Original fluorescence measurement curve; (b) normalized fluorescence quenching curve
Fig. 4. Normalized fluorescence quenching curves at different mass concentrations
Fig. 5. Relationship between fluorescence lifetime and dissolved oxygen mass concentration
Fig. 6. Fitting results of fluorescence lifetime with dissolved oxygen mass concentration. (a) Stern-Volmer equation direct fit; (b) lifetime correction fit
Fig. 7. Comparison test results between experimental measurement system and HQ30d analyzer
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