1. Department of Chemistry, University of Kerala, Thiruvananthapuram 695581, India
2. Department of Chemistry, Faculty of Education and Humanities, Gulu University, Gulu P.O. Box 166, Uganda
3. Department of Chemistry, Faculty of Science, Mbarara University of Science and Technology, Mbarara P.O. Box 1410, Uganda
4. Department of Nutritional Sciences and Dietetics, Kyambogo University, Kampala P.O. Box 1, Uganda
5. Department of Environmental Health and Disease Prevention, Faculty of Public Health, Lira University, Lira P.O. Box 1035, Uganda
6. School of Water, Energy and Environment, Water Science Institute, Cranfield University, College Road, Cranfield MK43 0AL, UK
7. Department of Physical Sciences, Kampala International University, Kampala P.O. Box 20000, Uganda
8. Department of Science and Vocational Education, Lira University, Lira P.O. Box 1035, Uganda
9. Chemistry Division, Testing Department, Uganda National Bureau of Standards, Kampala P.O. Box 6329, Uganda