Abstract.A simple method for the determination of mercury traces in co-products and final products of titanium (IV) oxide manufacturing was developed. It was shown that different procedures recommended for the total digestion of such materials (using mixtures of HF, HNO 3 , HCl and HClO 4 ) could be efficiently replaced by an unique partial digestion method based on mercury leaching from sample by HNO 3 . Partial digestion method was much quicker and more sensitive than total digestion methods. Mercury was detected with cold vapour atomic fluorescence spectroscopy and a detection limit of 10 pgHg/g was achieved. The method was validated using certified reference materials PACS-1 (NRCC) and maroccan phosphate rock (BCR). Regarding mercury content in analysed samples from the point of view of the ecological risk, only residual material after first digestion of raw material with H 2 SO 4 were found to contain mercury concentrations higher than accepted background value for sediment and soils (0.1 µgHg/g). All other co-products as well as the final product titanium (IV) oxide were almost free of mercury (< 0.01 -30 ngHg/g).