| abstract |
A device for measuring the absorbance of a substance in a solution, i) a sample cell (30) having a known path length (b) and containing a solution (S), which has a predefined wavelength A sample cell (30) that is transparent to light of the spectrum, and ii) can be operated independently by each controller (25), and light within the predefined wavelength spectrum described above along each optical path. Iii) a band-pass filter 22 provided in the optical path, and iv) a beam splitter (24) that splits light from the light source propagating along the path into a first part and a second part. ), The first part can be guided towards the reference detector (42) by the beam splitter and the second part can be led inside the cell (30), Beam splitter (24) V) a reference detector (42) for detecting the intensity of the first part of the light guided by the beam splitter; vi) a sample detector (40) for detecting the intensity of the second part propagating from the cell; An apparatus is disclosed that allows a sample contained in a cell to be illuminated with light of more than one wavelength at a low cost for more rapid or more accurate analysis. [Selection] Figure 1 |