Chemical Composition of the Essential Oil of Neem (Azadirachta indica A. Juss. ) Seeds Harvested in Senegal

Djibril Diedhiou; Mamadou Faye; Laure Candy; Virginie Vandenbossche; Christine Raynaud; Oumar Sock; Luc Rigal

doi:10.17485/IJST/v16i2.1650

Article

Chemical Composition of the Essential Oil of Neem (Azadirachta indica A. Juss. ) Seeds Harvested in Senegal

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v16i2.1650

Year: 2023, Volume: 16, Issue: 2, Pages: 118-122

Original Article

Chemical Composition of the Essential Oil of Neem (Azadirachta indica A. Juss. ) Seeds Harvested in Senegal

Djibril Diedhiou^1,2,3*, Mamadou Faye^1,2, Laure Candy², Virginie Vandenbossche², Christine Raynaud², Oumar Sock¹, Luc Rigal²

¹Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), ESP, UCAD, Dakar- Fann, 5085, Sénégal
²Laboratoire de Chimie Agro-Industrielle (LCA), ENSIACET, INPT - 4, Allée Emile Monso, 44362 -31030, Toulouse Cedex, France
³UFR Sciences Fondamentales et de l’Ingénieur /Université du Sine Saloum El Hadji Ibrahima Niass (USSEIN), Kaolack, Sénégal

*Corresponding Author
Email: [email protected]

Received Date:17 August 2022, Accepted Date:30 November 2022, Published Date:14 January 2023

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objective: To make better understanding of the neem seed composition (Azadirachta indica A. Juss.) particularly in Senegal by the extraction, the proportioning and the determination of the composition of its essential oil. Methods: The extraction of essential oil from neem seeds is carried out by hydro-distillation. The Gas Chromatography (GC) and Mass Spectrometry (MS) were used for analysis and identification of components. Findings: The yield of essential oil from dry neem seeds (95.7% dry matter) is 0.076%. The major compounds identified are 5,6-dihydro-2,4,6-triethyl- (4H) 1-3,5-dithiazine (39.1%), cis 1,2,4-Trithiolane, 3, 5-diethyl (7.9%), 1-H-indole 2,3-dione (7.9%), trans 1,2,4-Trithiolane, 3,5-diethyl (6.2%), and ethyl thioisobutyrate (4%). The classification of compounds reveals that the essential oil of neem seeds is composed of sulfur and nitrogen compounds (40.1%), sulfur compounds (25.3%), and nitrogen compounds (15.1%), sesquiterpenes (7.4%), Fatty Acid Esters (FAE) (1.5%) and hydrocarbons (0.4%). This composition reveals that neem essential oil is mainly composed of non-terpene compounds. Novelty: The method of analysis by GC-MS although being the most widely implemented in the quantification and identification of volatile compounds is not applied in the case of neem seeds of African origin.

Keywords: Chemical Composition; Essential Oil; Neem; Azadirachta indica; Seeds

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Copyright

© 2023 Diedhiou et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)