1. Faculty of Chemistry, VNU University of Science (Vietnam National University, Ha Noi) , Ha Noi , Viet Nam ;
2. General Department 4 (Ministry of Public Security), Lab of Profession Chemistry Institute of Biochemical Technology and Profession Documents , Ha Noi , Viet Nam ;
3. Viet Tri University of Industry , Phu Tho , Viet Nam ;
4. Institute for Chemistry and Materials, Military Institute of Science and Technology , Ha Noi , Viet Nam ;
5. Faculty of Chemistry, Thai Nguyen University of Education , Thai Nguyen , Viet Nam ;
6. Thai Nguyen College of Education, Thai Nguyen University of Education , Thai Nguyen , Viet Nam