DIRECT DETERMINATION OF METALS IN OILS BY INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY USING HIGH-TEMPERATURE NEBULIZATION

A method is described wherein a Babington V-groove nebulizer and heate d spray chamber is utilized to nebulize edible oil and lubricating oil directly into an inductively coupled plasma (ICP) to determine the me tal concentrations in the oils by ICP atomic emission spectrometry. Fa ctors influencing the attainment of a maximum analytical signal are di scussed. Both the methods of standard additions and normal calibration were used and calibration curves were linear in the range 0-10 mug g- 1 for Fe, Cu, Cr, Ti, Al, Ni, Mg, Ag and Na. The following detection l imits are reported: Fe, 0.032; Cu, 0.069; Cr, 0.051; Ti, 0.045; Al, 0. 328; Ni, 0.131; Mg, 0.003; and Ag, 0.077 mug g-1.