| 摘要 |
PURPOSE:To make the quantitative analysis of an intended material always possible by setting the three wavelengths corresponding to the three points of intersections of an absorption spectral curve of disturbing materials and a straight line, and performing prescribed constant operation and prescribed arithmetic processing of the operated constant and actually measured absorbance. CONSTITUTION:The three wavelengths corresponding to the three points of intersection of an absorption spectral curve B of disturbing materials and an arbitrary straight line (l) are set in a wavelength setter 1 by a pulse motor or the like responding to the operation of ten-keys or the like, and detectors, lambda1, lambda2, lambda3 are adjusted as prescribed. At the same time, the operation in accordance with the equationIis accomplished by a K calculator 2, whereby a constant K is determined. Thence, the operation in accordance with the equation II is accomplished in an arithmetic circuit 3 in accordance with the actually measured absorbances C1-C3 at the wavelengths lambda1-lambda3 of the mixed samples of the disturbing materials and an intended material, whereby the count value F corresponding to the determination of the intended material is determined. Hence, it is possible to keep the set wavelengths within a wavelength variable range in the case when the peak values of the absorption spectral curves A, B of the intended material and the disturbing material are spaced, thus the quantitative analysis of the intended material is accomplished always surely. |
