1. Institute of Quality Standard and Testing Technology, Chongqing Academy of Agricultural SciencesNongke Avenue401329 ChongqingP.R. China
2. Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology110016 ShenyangP.R. China
3. Institute of Quality Standard and Testing Technology, Ningxia Academy of Agriculture and Forestry Sciences750000 YinchuanP.R. China
4. Key Laboratory of Water, Environment, Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University404000 ChongqingP.R. China