Ming Gao, Ruifang Yang, Nanjing Zhao, Gaofang Yin, Liang Wang, Yuxi Jiang, Hengxin Song, Xiaowei Chen. Rapid Qualitative and Quantitative Analysis Method of Multi-Component Polycyclic Aromatic Hydrocarbons in Groundwater Using CNN and 3DEEM[J]. Acta Optica Sinica, 2025, 45(6): 0630001

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- Acta Optica Sinica
- Vol. 45, Issue 6, 0630001 (2025)

Fig. 1. CNN qualitative and quantitative analysis method
![Fluorescence fingerprint characteristics and linear correlation regions. (a) Anthracene; (b) phenanthrene; (c) pyrene; (d) naphthalene; (e) chrysene; (f) fluoranthrene; (g) benzo [a] pyrene; (h) benzo [b] fluoranthrene](/richHtml/gxxb/2025/45/6/0630001/img_02.jpg)
Fig. 2. Fluorescence fingerprint characteristics and linear correlation regions. (a) Anthracene; (b) phenanthrene; (c) pyrene; (d) naphthalene; (e) chrysene; (f) fluoranthrene; (g) benzo [a] pyrene; (h) benzo [b] fluoranthrene
![Relationship between mass concentration of benzo [a]pyrene solution and fluorescence intensity](/Images/icon/loading.gif)
Fig. 3. Relationship between mass concentration of benzo [a]pyrene solution and fluorescence intensity

Fig. 4. Three representative samples of incorrect predictions. (a) No. 267 sample; (b) No. 291 sample; (c) No. 301 sample

Fig. 5. Comparison of predicted mass concentration by proposed method and actual mass concentration. (a) Actual mass concentration; (b) predicted mass concentration

Fig. 6. Error in predicting mass concentration of PAHs. (a) Relative error; (b) absolute error

Fig. 7. Fluorescence background of actual underground water. (a) RS1; (b) RS2

Fig. 8. Error of RS1 quantitative analysis. (a) Actual mass concentration; (b) predicted mass concentration; (c) relative error; (d) absolute error

Fig. 9. Results of RS2 qualitative analysis

Fig. 10. Error of RS2 quantitative analysis. (a) Actual mass concentration; (b) predicted mass concentration; (c) relative error; (d) absolute error
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Table 1. Summary of 3DEEM spectral data
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Table 2. Evaluation results of qualitative model
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Table 3. Actual component of predicted error samples by qualitative model
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Table 4. Predicted error sample data of qualitative model
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Table 5. Evaluation results of quantitative model
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Table 6. Mass concentration range of samples in the test set

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