| 摘要 |
An apparatus for measuring light absorbance in a liquid sample which includes a light source for directing light into a sample cell, a cylindrical sample cell, a light detector for measuring intensity of light emitted from the cell and focussing means for forming a tapered light beam to pass through the sample cell. The tapered light beam can be either a diverging beam or a coverging beam through the cell. When the light beam is a diverging beam, a masking means is positioned downstream of the cell to assure that any light striking the cell wall is not directed to the light detector. |
