1. The Analysis and Testing Center, Southwest Jiaotong University, Chengdu 610031, China
2. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China
3. Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
4. Sichuan Academy of Environmental Sciences, Chengdu 610041, China
5. Sichuan Zhongbiao Technology Co., Ltd., Chengdu 610052, China