1. Department of Chemistry, Delta State University, P.M.B., 1, Abraka, Delta State, Nigeria
2. Department of Chemical Sciences, University of Africa, Toru-Orua, Bayelsa State, Nigeria
3. Department of Science Laboratory Technology, Delta State University, P.M.B. 1, Abraka, Delta State, Nigeria
4. Department of Science Laboratory Technology, Delta State Polytechnic, Ozoro, Delta State, Nigeria
5. Department of Chemistry, Federal University of Petroleum Resources, Effurun, Delta State, Nigeria
6. School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa