Infrared and Laser Engineering, Volume. 51, Issue 12, 20220243(2022)
Influence of temperature and turbidity on Rhodamine B tracer detection and correction
Figures & Tables(10)
Fig. 1. Emission fluorescence spectra of Rhodamine B standard solution at 553 nm excitation
Fig. 3. The fluorescence intensity of (a) 5 μg·L−1 and (b) 50 μg·L−1 Rhodamine B solution varied with temperature
Fig. 5. Fluorescence intensity of (a) 5 μg·L−1 and (b) 50 μg·L−1 Rhodamine B solution varied with turbidity
Fig. 6. Relationship between temperature, turbidity and the rate of change of concentration difference
Table 1. Different smoothing parameters
View tableView in ArticleTable 1. Different smoothing parameters
Smooth window $ R_C^2 $ RMSEC /μg·L−1 $ R_P^2 $ RMSEP /μg·L−1 5 0.9998 1.0528 0.9990 1.3440 10 0.9998 1.2460 0.9989 1.1147 20 0.9998 1.1098 0.9989 1.0838 30 0.9997 2.9757 0.9989 3.4249 40 0.9998 14.5986 0.9989 14.4773
Table 2. Results of establishing standard curves by partial least squares
View tableView in ArticleTable 2. Results of establishing standard curves by partial least squares
Evaluation index Peak intensity method Peak area integration method （Relative central wavelength width） ±9 nm ±11 nm ±13 nm ±15 nm ±17 nm $ R_C^2 $ 0.9997 0.9990 0.9990 0.9993 0.9994 0.9994 RMSEC/μg·L−1 0.5601 1.0730 1.1098 0.9402 0.8710 0.8746 $ R_P^2 $ 0.9988 0.9977 0.9984 0.9988 0.9990 0.9991 RMSEP/μg·L−1 0.9782 1.3658 1.1607 1.0136 0.9184 0.8708
Table 3. Effects of temperature on low concentration and high concentration models and compensation results
View tableView in ArticleTable 3. Effects of temperature on low concentration and high concentration models and compensation results
Temperature/ °C Model prediction value/μg·L−1 Relative error before correction Rate of change of concentration difference Corrected concentration value/μg·L−1 Relative error after correction Low High Low High Low High Low High Low High 10 5.22 49.43 4.40% 1.14% 0.04 −0.01 5.01 50.03 0.20% 0.06% 15 4.96 46.99 0.80% 6.02% −0.01 −0.06 5.01 50.01 0.20% 0.02% 20 4.70 44.55 6.00% 10.90% −0.06 −0.11 5.01 50.00 0.20% 0 25 4.44 42.11 11.20% 15.78% −0.11 −0.16 5.01 49.98 0.20% 0.04% 30 4.18 39.67 16.40% 20.66% −0.16 −0.21 5.01 49.96 0.20% 0.08% 35 3.93 37.23 21.40% 25.54% −0.21 −0.26 5.00 49.94 0 0.12% 40 3.67 34.79 26.60% 30.42% −0.27 −0.30 5.00 49.91 0 0.18% 45 3.41 32.35 31.80% 35.30% −0.32 −0.35 5.00 49.88 0 0.24% 50 3.15 29.91 37.00% 40.18% −0.37 −0.40 5.00 49.85 0 0.30% 55 2.89 27.47 42.20% 45.06% −0.42 −0.45 5.00 49.81 0 0.38% 60 2.64 25.03 47.20% 49.94% −0.47 −0.50 5.00 49.76 0 0.48%
Table 4. Validation of the compensation model
View tableView in ArticleTable 4. Validation of the compensation model
Original concentration/ μg·L−1 Temperature/ °C Turbidity/ NTU Rate of model change Measure the concentration value/ μg·L−1 Relative error of measurement Concentration value after compensation correction/μg·L−1 Relative error after compensation 38.00 40 48 −0.14% 35.02 7.84% 40.72 7.16% 45.00 25 36 −0.02% 42.25 6.11% 43.11 4.20% 56.00 30 42 −0.05% 50.78 9.32% 53.45 4.55%
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Xuefei Zheng, Chun Li, Xiaoyan Fan, Guang Yuan, Xiaoning Luan, Ziqing Yao, Kai Li. Influence of temperature and turbidity on Rhodamine B tracer detection and correction[J]. Infrared and Laser Engineering, 2022, 51(12): 20220243
Paper Information
Category: Photoelectric measurement
Received: Apr. 8, 2022
Accepted: May. 17, 2022
Published Online: Jan. 10, 2023
The Author Email: Li Chun (lichun08@ouc.edu.cn)
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