Patent ID: 6480274
Filing Date: 2002-11-12
Classification: G01N

Abstract:
A method of quantitatively determining mean oxide-forming element concentrations originating from oxides in a metallic material, the method comprising the steps of:(1) conducting a discharge operation a plurality of times between said metallic material and an opposing electrode in an inert gas atmosphere to obtain emission spectra; (2) selecting from said spectra the discharge by which an oxide-forming element spectrum and an oxygen spectrum exceed predetermined respective intensities; (3) subtracting said predetermined intensity of said oxide-forming elements as a background from the intensity of said oxide-forming element spectrum in said selected discharge, and accumulating spectra balances to obtain a cumulative spectral intensity; and (4) executing quantitative determination using a calibration curve, of the oxide-forming element concentration originating from oxides and said cumulative spectra intensity, prepared separately.