Zn, Fe, Se, and I concentrations present in tomato as affected by neem extract preservation in Sokoto, Nigeria


  • Yusuf Crown University International Chartered Incorporated




Tomato, Daneka, UTC, Zinc, iron, selenium, malnutrition, neem


Nowadays addition of chemicals to save tomatoes against early spoilage is rampant, but the chemicals are harmful; thus, bio-based alternative with novel features are needed. The aim of this study was to discover the effect of using neem leaves extract for preservation of two tomato cultivars collected from Sokoto, Nigeria. 5%, 10% and 25% (w/v) aqueous solutions of neem extract to be used to coat tomatoes were prepared and an experiment was done in a randomized control trial. Consequently, with the addition of neem extract for preservation of tomato; Zn, Fe, Se, and I were assessed in Daneka tomato variety using atomic absorption spectrometry.  The Fe level increase from 13.0 ± 0.05 ppm to 16.1 ±0.01 ppm. Selenium increase from 2.0 ± 0.05 ppm to 5.2 ± 1.5 ppm, iodine increase from 6.2 ± 0.02 to 8.0 ± 0.02 ppm in Daneka, and zinc increase from 14.0 ± 0.5 to 18.0 ± 0.2 ppm. The ranges of the determined Fe, Se, Zn, and I micronutrients in UTC tomato variety are respectively as follows: 14.0± 0.03 to 18.0± 0.03 ppm, 3.1± 0.03 to 7.0± 0.01 ppm, 15.6± 0.04 to 18.0± 0.01 ppm, and 7.0± 0.02 to 9.1± 0.02 ppm. Therewith, the concentrations of micronutrients increase with an increase in neem extract concentrations (p < 0.05). more studies are needed to make neem extract as a cheap, safe, and accessible substance for tomato preservation.






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Abdullahi, I.I., Abdullahi, N., Abdu, A., M., & Ibrahim, A.S. (2016). Proximate, mineral and vitamin analysis of fresh and canned tomato. Biosciences Biotechnology Research, 13(2),1163-1169.

Adekunle, C.P., Oladoyinbo, C.A., & Olowokere, F.A. (2020). Willingness to pay for iodine beatified tomato fruits among hypertensive patients in selected hospitals in Ogun state, Nigeria. Ife Journal of Agriculture, 32(1), 68-81.

Al-Fartuisie, F.S. & Mohsan, S.N. (2017). Essential trace elements and their vital roles in human body. Indian Journal of Advances in Chemical Science, 5(3), 127-136.

Ali, M.Y., Sina, A. A.I., Khandker, S.S., Neesa, L., Tanvir, E.M., Kabir, A., Khalil, M.I., Gan, S.H. (2021). Nutritional compositions and bioactive compounds in tomatoes and their impact on human health and disease: A review. Foods, 10(45), 1-45. https://dx.doi.org?10.3390/foods10010045.

Aliyu, L.S., Usman, A.Y., Musa, A. & Mani, U. (2018). Evaluation of nutritional compositions of healthy and infected dried tomato chips sold in Sokoto metropolis, Sokoto state, Nigeria. International Journal of Innovative Food, Nutrition and Sustainable Agriculture, 6(2), 1-4.

Buturi, C.V., Mauro, R.P., Fogliano, V., Leopnardi, C., & Giuffrida, F. (2021). Mineral biofortification of vegetables as a tool to imrove human diet. Foods, 10, 1-23.

Ciudad-Mulero, M., Pinela, J., Carvalho, A.M., Barros, L., Fernandez-Ruiz, V., Ferreira, I.C.F.R., Sanchez-Mata, M.D.C., Morales, P. (2022). Bioacessibility of macrominerals and trace elements from tomato (Solanum lycopersicum L.) farmers’ varieties. Foods, 11(1968). https://doi.org/10.3390/foods111131968.

Duborska, E., Sebesta, M., Matulova, M., Zverina, O., & Urik, M. (2022). Current strategies for selenium and iodine biofortification in crop plants. Nutrients, 14(4717), 1-20. https://doi.org/10.3390/nu14224717.

Emmanuel, A.O., Olugboyega, A.O., John, A.O., Adenike, S.B., & Edith, E.C. (2018). The effect of shelf-life on vitamins, lycopene and sugar composition of some common Nigerian tomato varieties. European Journal of Biotechnology and Bioscience, 6(5), 56-60.

Gada, Z.Y., & Ismaila, A. (2021). Assessment of some selected edible wild fruits (EWFs) as potential remedy to malnutrition in the rural areas of Sokoto state, Nigeria. Journal of Agriculture and Environment, 17(2), 123-131.

Gafar, MK, & Itodo, AU (2011). Proximate and mineral composition of hairy indigo leaves. Research Journal of Pharmaceutical, Biological and Chemical Sciences, 2(1), 669-682.

Garcia, M.A., Ventosa, M., Diaz, R., Falco, S., & Casariego, A. (2014). Effects of Aloe vera coating on postharvest quality of tomato. Fruits, 69(2), 117-126.

Gomathi, M., Vethamoni, P.I., & Gopinath, I. (2017). Biofortification vegetable crops- A review. Chemical Science Review and Letters, 6(22), 1227-1237.

Hamza, A., Gumi, A.M., Umar, A.I., Sarkingobir, Y., Tambari, U., & Sahabi, M. (2023). Effects of mango leaves utilization during postharvest storage of tomatoes on some macroelements (Na, K, Ca, M, and P) concentrations in Sokoto, Nigeria. Journal of Food Safety and Hygiene, 9(1),50-60.

Hassan, L.G., Sokoto, A.M., Ngaski, M.A., Anka, S.A., Chanchangi, B.M., Umar, K.J., & Ogbiko, C. (2018). Nutritional and ant-nutritional analyses of Hura Crepitans seeds cultivated in Sokoto North L.G.A. North Western Nigeria. Bayero Journal of Pure and Applied Sciences, 11(1), 126-130. Htttp://dx.doi.org/10.4314/bajopas.v11i1.22.

Hosea, Z.Y., Liamngee, K., Owoicho, A. L., and David, A. (2017). Effect of neem leaf powder on post harvest shelf life and quality of tomato fruits in storage. International Journal of Development and Sustainability, 6(10), 1334-1349.

Islam, M.Z., Mele, M.A., Baek, J.P., & Kang, H. (2018). Iron, iodine and selenium effects on quality, self life and microbiological activity of cherry tomatoes. Not Bot Horti Agrobo, 46(20, 388-392.

Jabin, C.R., Silistina, N., & Jatin, S. (2020). Determination of mineral content in some selected aquatic plants from Kalpani Beel of Assam using Absorption spectrometry. Journal of Aquatic Biology and Fisheries, 8, 133-138.

Kabore, K., Konate, K., Sanou, B., Compaore, E.W.R., & Dicko, M.H., (2022). Tomato by-products, a source of nutrients for the prevention and reduction of malnutrition. Nutrients, 14(2871),1-1-16. http://doi.org/10.3390/nu1414287.

Kaoje, A.U., Raji, M.O., Mainasara, A., Aghedo, M.O., & Raji, I.A. (2019). Household characteristics and food insecurity and their association with nutritional outcome of underfive children of a rural farming community of Sokoto state, Nigeria. Journal of Public Health Catalogue, 2(3),173-181.

Malick, P.K. (2021). Medicinal values of tomato (Lycopersicon esculentum Mill. –Solanaceae). International Journal of Applied Sciences, 9(3), 166-168. http://doi.10.312/ijasbt.v9i3.39789.

Mohammed, S.M., Abdurrahman, A.A., & Attahiru, M. (2017). Proximate analysis and total lycopene content of some tomato cultivars obtained from Kano state, Nigeria. ChemSearch, 8(1), 64-69.

Morakinyo, A.O., Samuel, T.A., & Adeoke, O.A. (2016). Mineral composition of commonly consumed local foods in Nigeria. African Journal of Biomedical Research, 19, 141-147.

Olaniran, A.F., Abiose, S.H., & Gbadamosi, S.O. (2013). Effect of ginger and garlic as biopresevatives on proximate composition and antioxidant activity of tomato paste. Ife Journal of Technology, 22(1), 15-20.

Oves, M., & Iqbal, IMI (2019). Phosphate availability and importance in a living system. Acta Scientific Microbiology, 2(9), 40-41.

Rao, M.R.K. & Lakshmanan, V. (2018). Study of bio-preservative potential of turmeric on tomato. Indo American Journal of Pharmaceutical Sciences, 5(50), 3818-3829.

Sager, M. (2017). Main and trace element contents of tomatoes. Journal of Food science and Engineering, 7, 239-248.

Sahin, O. (2020). Combined iodine, iron, and zinc biofortification of tomato fruit. Journal of the Institute of Science and Technology, 10(3), 2242-2251.

Sanusi, J., Habsatu, S., Abubakar, N., Suleiman, I., & Musa, D.D. (2020). Comparative study of proximate and minerals composition of tomato cultivars in Sokoto, Sokoto state, Nigeria. FUDMA Journal of Sciences, 4(4), 409-414.

Sarkar, S, Roy, D.K.D., Siddik, A. A., Das, K., & Rahman, J. (2015). Effect of chemical preservatives and storage conditions on the nutritional quality of tomato pulp. American Journal of Food and Nutrition, 3(4),90-100.

Sarkingobir Y; Sahabi, M., Saadu, A; Bello, M.M., & Bakwai M.S. (2019). Assessment of food insecurity among Almajiri in Sokoto Metropolis and selected environs (Gwadabawa and Kware), Sokoto state, Nigeria. Journal of Applied Science and Environmental Management, 23 (9), 1626-1629.

Sarkingobir, Y., Dikko, M., Tukur, & Umar, A.I. (2020). Determination of some macroelements (sodium, potassium, calcium, Magnesium and Phosphorus) in Some selected eggs (chicken, duck, quail, pigeon, guinea fowl and turkey in Sokoto Metropolis. Journal of Science and Technology Research, 2 (1), 162-166.

Sharma, S. (2015). Food preservatives and the harmful effects. International Journal of Scientific and Research Publications, 5(4), 1-2.

Udah, S.Y. (2021). Analysis of health consequences of preservatives on agricultural foods. Direct Research Journal of Agriculture and Food Science, 9(10),1-6. http://doi.org/10.267665/DRJAF10050172.

Umar, A.I., Umar R.A., Wasagu R.S.U., & Oche M.O. (2017) Assessment of Iodine levels of Secondary Schools Girls in Sokoto State Nigeria. International Journal of Food and Nutritional Science, 2(1), 020 –027.

Vaselina, V.H. & Dinev, N.S. (2021). Mineral content and quality parameters of tomato fruits as affected by different potassium fertilization treatments and cultivar specifics. Indian Journal of Agricultural Research, 55(2),169-174.

Zewdie, B., Shonte, T.T., & Woldestsadik, K. (2022). Shelf life and quality of tomato (Lycopersicon esculentum Mill.) fruits as affected by neem leaf extract dipping and beeswax coating. International Journal of Food Properties, 25(1), 570-592.




How to Cite

Yusuf. (2023). Zn, Fe, Se, and I concentrations present in tomato as affected by neem extract preservation in Sokoto, Nigeria. Journal of Tropical Chemistry Research and Education, 5(2), 1–8. https://doi.org/10.14421/jtcre.2023.52-01