A comparative study of the proximate, FTIR analysis and mineral elements of the leaves and stem bark oF Grewia lasiocarpa E.Mey. ex Harv.: An indigenous southern African plant

摘要

The crude powder of the leaves and stem bark of Grewia lasiocarpa E.Mey. ex Harv., commonly known as forest raisins were analysed for proximate chemical composition (% ash, % carbohydrate, % moisture, % crude lipid, % crude protein and % crude fibre), using the methods of Association of Official analytical chemist (AOAC) and the energy (Kcal) was derived. The FTIR spectrum in the mid-infrared region (4000-400 cm(-1)) was used for the identification of the different functional groups present. An analytical comparison of the Certified Reference Material (CRM) White Clover (BCR 402) gave a significant correlation between the certified values of the analyte elements (mg Kg(-1)) and the data obtained using Energy Dispersive X-ray fluorescence (EDXRF) microscopy. The fluorescence characters of the leaves and stem powder were done after treatment with different chemicals.