SILICA-GEL ANALYSIS BY SLURRY-SAMPLING GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY

Analytical conditions for the determination of cadmium, lead, copper, iron, aluminium and titanium in commercial silica gel samples by slurr y-sampling graphite-furnace atomic absorption spectrometry are establi shed. The influence of the silica matrix on the background absorption is described. Stability tests for slurries have been carried out. Resu lts are calculated by the method of standard additions. Statistical ev aluations of the results indicate that the slurry method is reproducib le and its precision is comparable to other methods used. Advantages o f this method are simplicity and short time of analysis.