Determination of Some Heavy Metals in Sudanese Manufacture Paints

Abstract

The study was carried out to three heavy metals Cadmium , Chromium and Lead of 30 samples of paint (emulsion and enamel) , the colors of paint were : cream , white , yellow and red . The samples were taken from 6 different factories in Sudan: Shirouq, Ayoub, National, Elmohandis, Nile and Celledur. A pretreatment was carried out to these samples with concentrated hydrochloric acid, and then diluted so as to be analyzed by atomic absorption spectroscopy. Cd , Cr and Pb were found to be present in all tested samples in varying concentration . Results showed that the maximum concentration of lead was 3430 ppm in the yellow enamel paint and the minimum concentration of lead was 0.1 ppm in white emulsion, red enamel. The maximum concentration of cadmium was 0.8 ppm in the white emulsion and the minimum concentration of cadmium was 0.1 ppm in white and yellow enamel. The maximum concentration of chromium was 500 ppm in yellow enamel and the minimum concentration was 0.1 ppm in red enamel. The study showed that most Sudanese paint factories were far behind international standards in lead .Cadmium and chromium did not exceed the international standards in the absence of Sudanese standard in paints.