| 摘要 |
PURPOSE:To enable reduction in a required analysis time while achieving a higher accuracy of an automatic spectrochemical analysis, by a method wherein calibration curves of absorbance and the amount of ions are set on an arithmetic unit beforehand and a mean of measured values obtained by measuring absorbance several times each in color ion colora tion and color formation areas is introduced into the arithmetic unit to determine the amount of ion from the calibration curves. CONSTITUTION:A sample solution is introduced into a reaction tank 2 from a sample solution tank 1 while a sample is introduced into the tank 2 from reagent tanks 3a-3e to reduce Fe<3+> to Fe<2+>. Thereafter, light is emitted from a light emitting body 7 moving a sample solution to a flow cell 6 to measure absorbance several times in a color ion coloration area with a photoelectric multiplier tube 8 and a mean thereof is computed and introduced into an arithmetic unit 9 on which reference calibration curves of absorbance and the amount of ion are previously set. Then, color forming reagents from the tanks 3a-3e are introduced to the tank 2 to make a color forming ion. Likewise, absorbance in an emission area is measured several times moving the color forming ion to the flow cell 6 to compute a mean. The results are introduced to the arithmetic unit 9 to perform a computation combining the results of measurement in a color ion coloration area and the amount of ion is analyzed from the calibration curves set to display 10.
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