EMISSION SPECTROPHOTOMETER

PROBLEM TO BE SOLVED: To simplify operation when judging effectiveness of correction between elements for reducing effect of spectral interference by a coexistent element by omitting measurement of a reference specimen including the coexistent element which is required before. SOLUTION: When a target element is set, a measurement wavelength position of the target element, a wavelength position for correction of the coexistent element at the wavelength position and an interference correction coefficient are read from a database (S2) and spectrum intensities of the target element and the coexistent element are calculated (S3, S5). Background correction is conducted for both the spectrum intensities and interference quantity at the measurement wave length position is estimated from the intensities after conducting the background correction and the interference correction coefficient (S4, S6, S7). Measurement accuracy in the case of conducting correction and measurement accuracy in the case of not conducting correction are calculated from the interference quantity and whether required accuracy is satisfied or not is determined (S8, S9, S11, S12). With this method, as it is possible to determine effectiveness of correction without creating a calibration curve, measurement of the reference specimen is not required. Thus, whether correction is required or not can be evaluated automatically without depending on judgement of a skilled person. COPYRIGHT: (C)2007,JPO&INPIT