Determination of Organic and Inorganic Components in Printing Inks

Abstract

This work was directed toward the study and analysis of printing inks specially those inks used in the printing of the newspapers. The goal is to determine the organic, inorganic contents and the additive materials of the ink by methods of analysis and to evaluate its toxicity and effects on the workers or dealers and the effect on the environment is traced. The samples were collected carefully from printing press in the industrial area – Khartoum. The methods of analysis were performed by atomic absorption and infra-red analysis after the samples preparation using acid digestion which approved existence of heavy metals have negative effects like iron ,lead , cadmium,cupper,cobalt and chromium.

The results obtained from atomic absorption spectroscopy shows that the contents of heavy metals such as Iron (2) in the black ink 3.149 ppm and in red ink 3.026 ppm ,in blue ink2.817ppm ,and in yellow ink 3.561 ppm lead is not found in any ink, and also cadmium. Cobalt in black ink 1420 ppm, in the red ink 7050 ppm and in the blue ink 1153 ppm . Chromium in black ink 1735 ppm red ink 1604 ppm ,in the blue ink 1911 ppm and in the yellow ink 1282 ppm . copper in black ink 418 ppm red ink 205 ppm ,in the blue ink 416 ppm and in the yellow ink 663 ppm . And infra red spectroscopy spectra show carbonyls (aldehydes) (1700-1740 cm-1) ,amines(3300-3500 cm-1) and alcohols(3300-3600 cm-1) functional groups.