Bao-lu DU, Meng LI, Jin-jia GUO, Zhi-hao ZHANG, Wang-quan YE, Rong-er ZHENG. The Experimental Research on In-Situ Detection for Dissolved CO2 in Seawater Based on Tunable Diode Laser Absorption Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1264
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 4, 1264 (2022)
Fig. 1. Typical absorption spectrum of CO2 obtained by the prototype
Fig. 2. Structure diagram (a) and schematic diagram (b) of the in-situ detection prototype based on TDLAS for dissolved CO2 in water
Fig. 3. Linear fitting of different standard CO2 gas concentration and absorption peak area
Fig. 4. The diagram of linear fitting (a) and relative error (b) between different standard CO2 gas concentration and measured concentration
Fig. 5. The measured results (a) and relative frequency distribution (b) of 800×10-6 standard CO2 gas for 30 minutes by the prototype
Fig. 6. The time series test results of the prototype for p CO2 in pier
Fig. 7. The testing stations information of the prototype in the east China sea
Fig. 8. The typical absorption spectrum (a) and second-harmonic (b) of CO2 obtained by the prototype in 20 meters depth of seawater
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