AUTOMATIC PREPARATION OF MILK DESSERT SLURRIES FOR THE DETERMINATION OF TRACE AMOUNTS OF ALUMINUM BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY

A method for the direct determination of aluminium in milk desserts is proposed, The method uses a how injection system connected semi-an-li ne to a graphite furnace atomic absorption spectrometer through an aut osampler for preparation of the slurries, addition of a chemical modif ier and dilution-homogenization in a mixing chamber. Calibration is pe rformed with aqueous standards. The bow system can be used to implemen t the standard additions method and investigate the effect of potentia l interferents in parallel by using two injection loops and the mergin g-zones mode. The slurries prepared contained up to 10% m/v. Aluminium was determined in various milk desserts at concentrations between 0.0 07 and 0.121 mg per 100 g.