The chemical constituents extractable from teak tree (Tectona Grandis Linn ) obtained from Fountain University, Osogbo

Abstract

A branch of Teak tree was cut, dried and grounded with mortar  and pestle before using blender. The powder was extracted with  four different solvents namely n-hexane, benzene, chloroform and distilled water; the extracts were concentrated using rotary  evaporator. Gas chromatography- mass spectroscopy (GC-MS) was used to identify various constituents in the samples. Bis(2-ethylhexyl)phthalate was the major constituent common to Chloroform (35.50 %) and benzene (26.78 %) while  n-hexadecanoic acid was the major constituent extracted by n-hexane (21.76 %) and water (24.16 %). Other phthalic acid derivatives extracted by both chloroform and benzene are Phthalic acid, di(2-propylpentyl)ester and di(oct-3-yl)ester. All the extracts were screened for termites repellence; all of them except water extract repelled termites in various degrees.

Keywords: Bis (2-ethylhexyl)phthalate, n-hexadecanoic acid, rotary evaporator, termites.