Science Journal of Analytical Chemistry

Submit a Manuscript

Publishing with us to make your research visible to the widest possible audience.

Propose a Special Issue

Building a community of authors and readers to discuss the latest research and develop new ideas.

Chemical Constituents, Proximate Composition, and Heavy Metals of the Oil Seed of Guizotia scabra Consumed in Plateau State-Nigeria

Guizotia scabra (L. F cass. composite) is an oil seed crop found wildly and in some areas cultivated at middle and higher geographical locations in Nigeria and other African countries. The objectives of this research were to among other things determine the physicochemical properties, proximate composition, and chemical constituents. Standard methods for physicochemical properties, proximate analysis and GC/MS was used to determine the chemical constituents. The physicochemical properties revealed acid value 0.455 mg/KOH/g. The percentage yield was 21.34%. The saponification value was 33.10 mg of KOH/kg. Peroxide value revealed 16.35 meq/KOH/kg. The iodine value was 66.83g/100g. The Specific gravity was 0.9246 and the viscosity was 25.3 mPa.s. A proximate composition 6.95% of moisture content, ash content was 3.05%, crude protein was 21.72%, crude fat was 24.4%, crude fibre was 29.5%, dry matter content was 93.50% and organic matter content was 96.95%. The chemical constituents revealed 9, 12-Octadecadienoic acid (31.80%) as the predominant unsaturated fatty acid in the seed oil while Dodecanoic acid (Lauric acid) (3.46%) is the predominant saturated fatty acid. The concentration of Zn in the samples was (1.146±0.00 µg/g), is higher than the other metals (Cu, Fe, Ni, and Pb), Ni and Pb were not detected in the sample. Guizotia scabra seed oil from Plateau state is therefore good for consumption due to it low acid value, good protein content, good amount of unsaturated fatty acid, low concentration of heavy metals and some phytochemicals.

Guizotia scabra, Chemical Constituents, Heavy Metals, Phytochemicals, Proximate Composition, Plateau State

APA Style

Pam Audu Chomo, Anya Ezekiel Gyang, Joyce Bahago Istifanus. (2023). Chemical Constituents, Proximate Composition, and Heavy Metals of the Oil Seed of Guizotia scabra Consumed in Plateau State-Nigeria. Science Journal of Analytical Chemistry, 11(1), 9-12. https://doi.org/10.11648/j.sjac.20231101.12

ACS Style

Pam Audu Chomo; Anya Ezekiel Gyang; Joyce Bahago Istifanus. Chemical Constituents, Proximate Composition, and Heavy Metals of the Oil Seed of Guizotia scabra Consumed in Plateau State-Nigeria. Sci. J. Anal. Chem. 2023, 11(1), 9-12. doi: 10.11648/j.sjac.20231101.12

AMA Style

Pam Audu Chomo, Anya Ezekiel Gyang, Joyce Bahago Istifanus. Chemical Constituents, Proximate Composition, and Heavy Metals of the Oil Seed of Guizotia scabra Consumed in Plateau State-Nigeria. Sci J Anal Chem. 2023;11(1):9-12. doi: 10.11648/j.sjac.20231101.12

Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

1. Chomo, P. A., Okunola, R. M., and Suleiman, S. S. (2022). Amino acid profile of the oil seed of Guizotia scabra harvested from Plateau and Kaduna States- Nigeria. Nigerian journal of chemical research. 27 (1) 054-060.
2. AOAC, (2003). Official methods of analysis of the association of official’s analytical chemists, 17th ed. Association of official analytical chemists, Arlington, Virginia.
3. AOAC (2006). Official Method of Analysis of AOAC International. 18th Ed., Gaithersburg, USA.
4. Singh, B. C and Matiwes, S (2015). Ntrient composition of niger seed cultivated in different parts of Ethiopia, Bull chemical society Ethiopia, 29 (3), 341-355.
5. FAO/WHO (2009). Report on the 21st session of the Codex Alimentarius Committee on fats and oils. Kola Kinabalu, Malaysia.
6. Baerts, M. & Lehmann, J. (2002). Guizotia scabra. Prelude Medicinal Plants Database, Metafro-Infosys, Royal Museum for Central Africa, Tervuren, Belgium.
7. AOAC, (1990). Official methods of Analysis 15th Ed, Association of Official Analytical Chemist, Washington DC. 777-796.
8. Haris, G. K., and Marshall, M. R. (2017). Ash analysis, In: Nielson ss (ed) Food Analysis, 5th edn. New York, Springer.
9. Pearson, D. (1976). The Chemical Analysis of Foods. 7th Ed, Edinburgh, UK Churchill Livingstone.
10. AOACS, (1998). Fats and oils Handbook 1-55. Retrieved 10 June 2021 from http://doi:org/10.1016/B978-09818936.0.50006-8
11. AOAC (1999). Official Method of Analysis by the Association of Official AnalyticalChemist, Washington D. C., USA: Association of Official Analytical Chemists, Inc.
12. Ishida, H. H., Suzono, N., Sugiyama, S., Innam, I. T., Tadokoro, & Maekawa, A (2000). Nutritive Evaluation on chemical components of leaves, stalks, stems of sweet potatoes. (Ipomoea batatas poir). Food Chemistry, 68, 359-367.
13. Mozaffarian, D. R., Micha, R., & Wallace, S. (2010). Effects on coronary heart disease of increasing polyunsaturated fat in place of saturated fat; a systematic review and meta- analysis of randomized-controlled trials. Nutrition Source, 7 (3).
14. Bhavsar, G. J., Sayed H. M. M and Andhale, R. R. (2017). Characterization and quality assessment of mechanically and solvent extraction of Guizotia abyssinica seed oil.
15. Matiwes, S., & Bhagwan, S. C. (2015). Nutrient composition of niger seed (Guizotia abyssinica (l. f.) cass.) cultivated in different parts of Ethiopia. Bull chemical society, 29 (3), 341-355.
16. Elleuch, M., Besbes, S., Roiseux, O., Blecker, C., & Attia, H. (2007). Food Chemistry, 103, 641.
17. (Scientific Committee on Food (SCF), 2003). Greenfact. Facts on Health and the environment.