Abstract
The analysis of essential oil has basically one technical goal: to achieve the best possible separation performance by using the most effective, available and current technology of chromatography. The present work aimed to study the formulation created by the adsorption of active components of Lavandula angustifolia essential oil on sodium modified bentonite. Essential oils were obtained from dried leaves of L. angustifolia ; they were extracted by hydro distillation and were analyzed by gas chromatography-mass spectrometry (GC-MS) and gas chromatography flame ionization detector ( GC-FID). The retention indices (RI) were calculated for each detected component. Besides, the characterization of the individual components making up the oils was performed with the use of a mass spectrometry (MS) library. The quantitative analysis was made by GC - FID . The identified components accounted for more than 95% for each essential oil. The results of these studies show that organic contaminant adsorption is dependent, to some degree, on solid-liquid ratio and the competition system of mixture. The adsorption amount of terpenics and the others components could be the results of many factors. The selectivity was affected by the abundance of each component in the crude essential dependent on the particle size fractions; the finer fractions adsorbed higher amounts. The selectivity of adsorption was affected by the polarity of terpenic components. Keywords: Clays, bentonite, essential oil, adsorption, Lavande angustifolia . African Journal of Biotechnology , Vol 13(31) 3413-3425
Highlights
Clays are widely used in pesticide formulation as adsorbents or particulate fillers
This paper presents the study of the adsorption of active components of Lavandula angustifolia essential oil on sodium purified bentonite
The amount of each compound adsorbed by clay fractions is: The identification of the compounds was made through a comparison of retention time (Rt) and Kovats indices with results obtained by GC-FID
Summary
Clays are widely used in pesticide formulation as adsorbents or particulate fillers. Many researchers studied the adsorption of pesticide on clay material (Lagaly, 2001) to limit pest damages. The common method insect attacks is insecticides. Used to prevent stored products from the one that make use of synthetic use of such insecticides is increasing.
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