A comparative Analytical Studies onAcaciapolyacantha gum Samples collected from three different locations in Sudan

By Ahmed El-Henawy, E. A. Omer, A. Alomari, M. Osman. 2014

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Acacia polyacantha gum(Kakamut gum) samples were collected as natural exudates, from three different locations in Sudan  named Abugarin, Gargadah  and Layoon forest. Physicochemical properties of gum samples were studied (moisture , ash ,nitrogen , protein, specific rotation, intrinsic viscosity , refractive index, equivalent weight, pH , uronic acid and reducing sugars . Results showed significant differences within each location in most  parameters studied, refractive index values were found to be constant in all samples (1.3337) . The effect of location on the properties  of gum samples was studied and the analysis showed generally insignificant difference  (p≥ 0.05) in all properties studied, except moisture and uronic acid showed significant differences. The general characteristics of Acacia  gum might be described as a mean value of all properties studied  of all gum samples of the three different locations as follows ; 8.3% moisture, 2.9%  ash ,0.35%nitrogen, 2.30% protein,-16.8 o specific rotation,10.3ml/g intrinsic viscosity, 4.9 pH , 1348.68 equivalent weight,  14.5%uronic acid, 1.3337 refractive index  and 0.20%reducing sugar . UV absorption spectra of gum samples were determined and the maximum  absorption  points were found the same ranging between wavelength (208 and 211nm) . The cationic composition of gum samples was also determined and the results showed that sodium(43.075ppm) has the highest value in all samples followed by iron(27.667ppm) ,zinc(14.297ppm),nickel(4.650ppm),copper(4.025),manganese(2.645ppm),calcium(1.284ppm) and trace amount of lead(0.667ppm),potassium(0.344ppm)andmagnesium(0.274ppm). Accordingly, these parameters, therefore, cannot be  recommended as qualifying indices.

Subfields: Food Science, Forestry

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