Levels of essential and toxic metals in Ethiopian khat, (Catha Edulis Forsk.)

A Ashenef, G Birhanu, E Engidawork
2014 Ethiopian Journal of Environmental Studies and Management  
Khat chewing is a common habit in East Africa and Arabian Peninsula. However, detail of in-organic elemental content of this plant is scarcely known. Samples of khat (Catha edulis) were collected from different parts of Ethiopia. The leaf parts, which are chewed, were separated and air dried at room temperature. The dried samples were grounded to a fine size by the use of stainless steel mills. One gram was mineralized for metal analysis via digestion in aqua regia under reflux. Spiking was
more » ... ux. Spiking was performed to check the accuracy of the digestion procedure. Recoveries varied from 84.5 % to 109.6 %. Thirteen metal concentrations were measured by Flame Atomic Absorption/Emission Spectrometer and Graphite Furnace Atomic Absorption Spectrometer employing an external calibration curve. Levels of metals (mg/kg) on Dried Weight Basis were recorded as follows; Cu: 5.11-9.55 Cd: 0.03-6.54 Pb: non detectable to 1.
doi:10.4314/ejesm.v7i3.8 fatcat:k6kzlyl7krgqfe3mhkporf2czq