1. Department of Chemistry, Al-Najaf Education Directorate, Ministry of Education, Najaf, Iraq
2. Department of Chemistry, Al-Rsaffa Al-Ulla Directorate, Ministry of Education, Baghdad, Iraq
3. Department of Chemistry, Al-Qadisiyah Education Directorate, Ministry of Education, Al-Qadisiyah, Iraq
4. Medical Laboratory Technology Department, College of Medical Technology, The Islamic University, Najaf, Iraq
5. The Department of Chemistry, The Gifted Students’ School in Najaf, Ministry of Education, Najaf, Iraq
6. Department of Analytical and Toxicology Chemistry, Odesa I.I. Mechnikov National University, Odesa, Ukraine