ABSTRACT
Gum Arabic is most important commercial poly-saccharine and it is probably the oldest food hydro-colloid in current use. Gum Arabic is naturally obtained from Acacia Senegal and seyal trees which are known to grow in sub Sahara region of the Sudan. Two types of Gum Arabic namely; Acacia Senegal and Seyal were used. X-ray fluorescence [XRF] and Fourier Transformation infrared spectroscopy [FTIR] were used as analytical techniques. The conductivity and dielectric of both types of Gum Arabic were measured as function of frequency. Solutions with different concentration of Gum Arabic for both types were prepared and the Ultraviolet-visible spectroscopy [UV] was used to study the optical properties of these solutions. The XRF results indicated that, Gum Arabic [Acacia Senegal and Seyal] contained Calcium [Ca], Iron [Fe], Copper [Cu], Lead [Pb], and Strontium [Sr]. The FTIR spectra of both types of Gum Arabic showed broad and strong absorption band in the range of 600 to 3000 cm-1. These absorptions were assigned to the different stretching vibrations. The conductivity was found to increase with frequency while the opposite behavior observed for the dielectric. The absorption was found to increase with the increase of concentration
ABSTRACT
Hibiscus is a genus of flowering plants in the mallow family, Malvacease. It is quite large, containing several hundred species that are native to warm-temperate and have many medical benefits, for example, hibiscus drink lowers high blood pressure. Flowering plants of hibiscus were used in this study. X-ray fluorescence [XRF] and Fourier Transformation infrared spectroscopy [FTIR] were used as analytical techniques. The XRF results indicated that, hibiscus has contained Potassium [K], Calcium [Ca], Iron [Fe], Copper [Cu], Bromine [Br], and Strontium [Sr]. The FTIR spectra of hibiscus showed a broad and strong absorption band in the range1145-2926 cm-1, and these absorptions were assigned to the different stretching vibrations. The conductivity and dielectric properties of hibiscus were measured as function of frequency. The conductivity was found to decrease with frequency while the opposite behavior was observed in case of dielectric. In order to investigate the optical properties, solutions with different concentration of hibiscus were prepared. Ultraviolet-visible spectroscopy [UV] was used to obtain the absorption for different samples with different concentration. The absorption was found to increase with the increase of concentration of hibiscus