Abstract
A selection of analytical line pairs has been made for use in the spectrographic analysis of low alloy steel. Lines were paired on the basis of similar excitation potentials and wavelength separation. It was found that when excitation potentials of the individual members of a pair were within 23 or 32 of each other, high accuracy and reproducibility were obtained even under conditions of considerable matrix variation, and that within these limits minimum wavelength separation between the lines becomes more important than a closer match in excitation energies for improved reproducibility of line pairs. The lines selected and deviations obtained using these lines under considerable matrix variations are given in tabular form.
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