Abstract:
Physiochemical and thermodynamic properties of a
composite sample of Anogeissus Leiocapus gum were
studied using standerd methods.
The average values
of a diferent Characterization methods were determined
to obtain the mean values of: moisture, ash, nitrogen
and protein,
specific rotation, intrinsic viscosity,
refractive index, ph of The gum.
The results of this
characterization as the mean values of all proprieties as
follows : 10.7 %, 2.6 %, 0.7, 4.5, - 43.8, 0.43, 1.333,
5.00 respectively. cationic composition of gum sample
was also determined for eight elements: potassium (K),
Calcium (Ca), Magnesium (mg), Copper (Cu), Sodium
(Na), Zinc (Zn), Irion (Fe) and Lead (pb). The results is:
494.4, 356.7, 285.7, 95.5, 50.5, 8.5, 4.9, 0.3 respectively.
The solubility of Anogeissus leiocarpus gum in water was
determined and found to be 65.5 % . molecular weight
of polymer by osmotic pressure was found to be 6.82746
× 10 5 Da.
The thermodynamic properties of the gum solution
(partial specific volume of gum sample and the solvent
(water), volume fraction of both,
and density of solid)
was studied and the values was found to be: 0.7, 1.001,
0.41,
0.59,
0.881 respectively.
The changes in
Chemical potential of gum sample in a diferent
concentration of gum solution was calculated and were
3found to be in the range ( -0.84 to ×-7.47 10 -3 Jg -1 ). The in the range (-0.74 to -4.33×10 -2 Jg -1 ).
