Determination of the n-alkane profile of epicuticular wax extracted from mature leaves of Cestrum nocturnum (Solanaceae: Solanales)

Abstract

An n-hexane extract of fresh, mature leaves of Cestrum nocturnum (Solanales: Solanaceae) containing thin layer epicuticular waxes was analysed by thin-layer chromatography, infrared and gas liquid chromatography using standard hydrocarbons. Seventeen long chain alkanes (n-C₁₈ to n-C₃₄) were identified and quantified. Hentriacontane (n-C₃₁) was established as the major n-alkane, while nonadecane (n-C₁₉) was the least abundant component of the extracted wax fraction. The carbon preference index calculated for the sample was 1.30, showing an odd to even carbon number predominance.

Keywords:

• alkane
• epicuticular wax
• hydrocarbon
• carbon preference index
• Cestrum nocturnum