
This invention relates to a multi-component absorbance monitor, and the object is to provide a general-purpose and highly accurate compact absorbance monitor. Disclosed is an absorbance monitor including a light source, a sample cell and a plurality of detectors as elements, wherein a light collecting member is arranged between the light source and one detector, and an inside wall of the light collecting member has a site for guiding a part of light from the light source, that is, a light guidin...











