SPECTRAL INTERFERENCES IN THE DETERMINATION OF RARE-EARTH CERIUM ELEMENTS IN GEOLOGICAL SAMPLES BY ATOMIC-EMISSION SPECTROMETRY USING AN ARC DOUBLE-JET PLASMA GENERATOR

Spectral interferences were studied using Q(I) values equal to the rat io S (the slope of a calibration graph) between the partial sensitivit y S-I(lambda(a)) Of an interfering line at the wavelength lambda(a) an d the peak sensitivity S-A of the resonance line lambda(a). Automated wavelength scanning and computer processing of scans were performed fo r ten resonance lines of rare-earth cerium-group elements in spectra e xcited in an argon flow of an are double-jet plasma generator. The con tribution of spectral interferences to the values of real detection li mits was estimated.