| 摘要 |
PROBLEM TO BE SOLVED: To directly and rapidly analyze a component in a molten metal through atomic absorption analysis, even in case where the surface of the molten metal does not become a stationary surface. SOLUTION: In a method for directly analyzing molten metal by irradiating the surface 5 of the molten metal, by laser and receiving the reflected beam from the surface of the molten metal and calculating the concentration of a target element in the molten metal, on the basis of atomic absorption generated by the metal vapor 9 present in the light path of the reflected beam, measuring laser beam adjusted to the absorption wavelength of the element to be analyzed and comparing laser beam adjusted to a wavelength generating no atomic absorption in the molten are allowed to be incident on the surface of the molten metal using the same optical path to be reflected and the intensities of the reflected beams are continuously measured at a cycle of 10 msec or less, to calculate the absorbancy from the intensities of the reflected beams. Or both the laser beams are reflected, so that irradiation surface on the surface of the molten metal becomes a diameter of 5 mm or larger to calculate absorbancy from the intensities of the reflected beams. |
