1. College of Chemistry and Environmental Science, Hebei University, No. 180 Wusi Road, Baoding 071002, P. R. China
2. Environmental Monitoring Center, Dongfeng East Road, Baoding 071000, P. R. China
3. Medical Experimental Centre of Hebei University, No. 342 Yuhua Road, Baoding 071000, PR China
4. College of Chemistry and Environmental Science, Key Laboratory of Medicine Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, No. 180 Wusi Road, Baoding 071002, P. R. China