1. College of Chemistry; Sichuan University; Chengdu 610064 Sichuan China
2. Analytical and Test Center; Southwest University of Science and Technology; Mianyang 621010 Sichuan China
3. Chengdu institute of Geology and Mineral Resources; Chengdu 610081 Sichuan China
4. Chemistry Department; King Abdulaziz University; Jeddah 21589 Saudi Arabia