International Journal of Chemistry Studies

Authors
Seifeldawla A Elhag, Mohamed E Osman, Elfatih A Hassan, Amira A El-Hassan, Mustafa E Ahmed

Abstract
Three composite samples of Gummeferae gum of positive specific optical rotation (+S.O.R) A.nilotica var. tomentosa season 2015, A.nilotica var nilotica season 2010, and A.Orefota season 2015, from Sinnar, Blue Nile states and El-Jazeera states were subjected to physicochemical analysis. The results showed moisture contents were (11.17%, 11.6%, and 12.5%), ash% (2.05%, 1.81%, and 1.48%), pH (5.2, 5.1, and 4.96), S.O.R+ (+90, +103, and +70), nitrogen and protein percent (0.06%, 0.025%, and 0.46%), and (0.35%, 0.16%, 2.85%),, intrinsic viscosity (10.88, 9.02, and 5.60), Mwt (5.3 x10⁶, 2.94 x10⁶, and 7.91x10⁶ gmol^-1), acid equivalent weight (2105, 1984, and 3409), total glucouronic acid (9.22%, 9.8%, and 5.69%), and Colorific value (3.97 Kcal/g, 4.03 Kcal/g, and 4.04 Kcal/g) respectively. The relationship between Colour Gardner and tannin content was investigated. The results were found to be in average values, The Colour Gardner was directly proportional to the tannin content of all samples.