CORRECTION OF INTERFERENCE OF ALUMINUM TO THE DETERMINATION OF CARBON IN THE DIRECT-READING AES ANALYSIS OF TITANIUM ALLOYS

It was found that in the direct-reading AES analysis of titanium alloys,linearity of the working curve of carbon was poor in precision,due to the interference of co-existing aluminum as an alloying element.The content of aluminum in some kinds of commonly used titanium alloys amounts to about w(Al) 6%,which during excitation of the sample gave relatively strong spectral intensity at the wave-length of 193.003 nm,very close to the analytical spectral line of crabon at 193.090 nm,thus leading to an additive spectral interference and a positive error.Two types of interferences were encountered in the preparation of the working curve of carbon,i.e.the translational interference and of revolving interference and the correction factors for both these interfering effect were determined,by which the spectral intensity measured for carbon was corrected.By using the corrected working curve,analytical results of carbon obtained were in conformity with the known values.