PROBLEM TO BE SOLVED: To provide an absorbance analyzer constituted so as to eliminate the leak of a liquid from a slide part accompanying an increase in flow pressure at the time of reduction of an optical path length and capable of precisely analyzing the absorbance characteristics of the liquid by obtaining a predetermined optical path length with high reproducibility.;SOLUTION: The absorbance analyzer is constituted so as to be equipped with a pair of light transmissible flat plates 11a and 11b for forming an optical path through which the liquid flows, an optical path altering mechanism 13 for moving at least one flat plate to alter the length of the optical path, a light source 2 for emitting the incidence light to the optical path, an optical sensing means 3 for sensing the intensity of the transmitted light from the optical path, an analyzing means 4 for analyzing absorbance characteristics from the intensity of incident light and transmitted light and a position adjusting means 5 for adjusting the position of at least one of the pair of the flat plates 11a and 11b.;COPYRIGHT: (C)2005,JPO&NCIPI
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