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

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

Pam Audu Chomo¹, Anya Ezekiel Gyang², Joyce Bahago Istifanus³

¹Department of Applied Chemistry, Kaduna Polytechnic, Kaduna, Nigeria

²National Board for Technology Incubation Centre, Kaduna, Nigeria

³Department of Chemical Sciences, Federal University Wukari, Wukari, Nigeria

Science Journal of Analytical Chemistry, Volume 11, Issue 1, March 2023

Pages: 9-12

Received: Oct. 08, 2022

Accepted: Nov. 10, 2022

Published: Mar. 31, 2023

DOI: 10.11648/j.sjac.20231101.12

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Abstract

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.

Keywords

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

To cite this article

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

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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.

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