Abstract: Some commonly consumed differently packaged soft drinks were investigated for their levels of As, Cd, Co, Cu, Mn, Pb and Zn. This was done in order to evaluate the effect of container materials on the levels of potentially toxic metals in the drinks and the health related short and long-term implications of regular consumption of these products. Batches of differently packaged soft drinks (in glass bottles, cans and plastic bottles) in Nigeria were purchased from wholesale stores in Ile-Ife, Nigeria. Atomic Absorption Spectrophotometer (AAS) was used to quantify the total amount of metals in the acid digested samples. The study revealed that most of the analyzed potentially toxic metals were at concentrations above the recommended WHO and USEPA permissible limits. The effect of packaging materials on the concentration of some of the analyzed metals in the soft drinks was significant at 95% confident level. From the results of this study, it could be concluded that caution should be exercised regarding regular and consistent consumption of these soft drinks as such habit might constitute a significant source of exposure to potentially toxic metals.Abstract: Some commonly consumed differently packaged soft drinks were investigated for their levels of As, Cd, Co, Cu, Mn, Pb and Zn. This was done in order to evaluate the effect of container materials on the levels of potentially toxic metals in the drinks and the health related short and long-term implications of regular consumption of these products. Ba...Show More
Abstract: Colloid science is the science of both large molecules and finely subdivided multiphase systems. It is the system of more than one phase that colloid and surface science meet. Colloid science is interdisciplinary in many respects; its field of interest overlaps physics, biology, materials science, and several other disciplines. It is the particle dimension – not the chemical composition (organic or inorganic), sources of the sample (e.g., biological or mineralogical), or physical state (e.g., one or two phases). The colloidal solutions or colloidal dispersions are intermediate between true solutions and suspensions. In other words, the diameter of the dispersed particles in a colloidal dispersion is more than that of the solute particles in a true solution and smaller than that of a suspension. The knowledge of colloid chemistry is required in various aspects of chemistry. It is a field that has offered more and still has much more to offer; therefore chemists should be studious to extract more uses from this field as it still has more to offer. This article is aimed at reviewing the properties as well as some of the uses of colloids.Abstract: Colloid science is the science of both large molecules and finely subdivided multiphase systems. It is the system of more than one phase that colloid and surface science meet. Colloid science is interdisciplinary in many respects; its field of interest overlaps physics, biology, materials science, and several other disciplines. It is the particle d...Show More
