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Application of full 42 Factorial Design for the Development and Characterization of Insecticidal Soap from Neem Oil

Author(s): A. S. KOVO

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 5;
Issue: 8;
Start page: 29;
Date: 2006;
Original page

Keywords: Neem oil | Extraction | Factorial Design | Insecticidal soap | Solvent type

The aim of this paper was to investigate the extraction, characterization and production of insecticidal soap from Neem oil using full 42 factorial design. Soxhlet extractor was used for the extraction purpose and two solvent was chosen to determine which is better. N-hexane gives a Neem oil yield of 45.43% while ethanol gives a yield of 46.38%, confirming the earlier literature result giving ethanol as better solvent for Neem oil extraction. The basic properties of the oil were determined as follows, saponification value 215.95ml/g, acid value 1.122g/mol, unsaponifiable matter 19.66 etc. The Neem oil was found to have a colour of golden yellow due to the presence of Nimbidin.Full 42 factorial design and mathematical model was applied to the extraction process and a first order regression equation of the form:Y = 9.548 + 0.144X1 + 0.1931X2 + 0.1892 X12was obtained growing the individual effect of time and solvent type as parameter and their interaction in the entire extraction process the Neem insecticidal soap was found to be effective in insect and pest control.
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