International Science Community Association International Research Journal of Biological Sciences 2278-3202 12 2 2023 08 10 Comparative study, chemical composition of (Allium cepa) onion, (Alliumsativum) garlic and (Z. officinale) ginger 29 33 EN Menon Karthika S. 1 Department of Botany, Vimala College (Autonomous), Thrissur, Kerala, India P.M. Dhrisya 2 Department of Botany, Vimala College (Autonomous), Thrissur, Kerala, India Mshelmbula Barka P. 1 Department of Plant Science and Biotechnology, Federal University of Lafia, PMB 146, Lafia, Nigeria Anoliefo Geoffrey O. 2 Environmental Biotechnology and Sustainability Research Group, Dept. of Plant Biology and Biotechnology, University of Benin, Benin City, Nigeria Ikhajiagbe Beckley 3 Applied Environmental Biosciences and Public Health Research Group, University of Benin, Benin City, Nigeria and Department of Microbiology, University of Benin, Benin City, Nigeria Edegbai Boniface O. 4 Environmental Biotechnology and Sustainability Research Group, Dept. of Plant Biology and Biotechnology, University of Benin, Benin City, Nigeria Goodlife Eugenia Ebene 1 Department of Plant Science and Biotechnology, Rivers State University, PMB 5080, Port Harcourt, Rivers State, Nigeria Jaja Emylia T. 2 Department of Plant Science and Biotechnology, Rivers State University, PMB 5080, Port Harcourt, Rivers State, Nigeria Wilson Victoria 3 Department of Plant Science and Biotechnology, Rivers State University, PMB 5080, Port Harcourt, Rivers State, Nigeria Remi Osanyinlusi 1 Department of Science laboratory technology (Chemistry Unit), Rufus Giwa Polytechnic Owo, Ondo State, Nigeria > Research Paper 2023 3 29 2023 08 10 Onion (Allium cepa), ginger (Zingiber officinale) and garlic (Allium sativum) are house hold and popularly utilized plants that have been exploited severally for its nutritional qualities. The phytochemical constituents, mineral and proximate composition of onion ginger and garlic were investigated. They were grated separately using hand grater. Phytochemical screening was carried out on the resulting grated samples and it was discovered that the three samples contains carbohydrates, phytosterols and saponnins, and absence of glycosides. The status of some other secondary metabolites (alkaloids, tannins, steroids, phlobatannins, proteins, flavournoids and terpenoids) in the three samples was identified. A proximate analysis was carried out in the laboratory in order to evaluatesome parameters which include the moisture content, ash value, protein, fats, carbohydrate and fibre content of the studied samples. The results of the proximate analysis showed that onion bulb, ginger and garlic contain mostly moisture (81.881, 75.917 and 71.210) and carbohydrates (10.865, 10.868 and 9.110) with crude fat, fibre and ash at the least concentrations for the three samples. The elements investigated are: Sodium, Potassium, Calcium, Phosphorous, Zinc, Manganese, Cooper, Iron. Calcium and potassium followed by phosphorous were confirmed to be the most abundant elements in the studied samples while copper, manganese and zinc took the least concentrations. Copyright@ International Science Community Association