Analytical data for Acacia senegal var. senegal gum samples collected between 1993 and 1995 from Sudan |
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| Authors: | K.A Karamalla N.E Siddig M.E Osman |
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| Affiliation: | aDepartment of Biochemistry and Soil Science, Faculty of Agriculture, University of Khartoum, PO Box 32, Khartoum North, Sudan;bKhartoum Gum Arabic Processing Company (GAPC), Baladia Avenue, PO Box 12034, Khartoum, Sudan;cThe Gum Arabic Company Ltd, PO Box 857, Khartoum, Sudan |
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| Abstract: | Over 1500 authentic and commercial A. senegal var. senegal gum samples were analysed to evaluate existing quality control parameters and to assess the potential of new parameters such as pH, viscosity, viscosity average molecular weight (MV) equivalent weight and total uronic acid content as additional qualifying indices. The data obtained indicate the following mean values: moisture (10.75%), ash (3.77%), nitrogen (0.328%), specific rotation (−31.3°), pH (4.66), equivalent weight (1436) and total uronic acid content (13.71%). The results also indicate wide variations in intrinsic viscosity and viscosity average molecular weight (mean values 16.4 ml g−1 and 9.0×105, respectively. Accordingly these parameters, therefore, cannot be recommended as qualifying indices. |
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| Keywords: | Gum arabic Acacia senegal var. senegal Hashab gum Specifications Specific rotation and nitrogen content |
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