| 摘要 |
PURPOSE:To accurately measure the concn. of polluted organic matter in sample water continuously over a long period of time by branching the light emitted from the same spot of a gas discharge tube to two directions, allowing one light thereof to pass through the sample then processing the same. CONSTITUTION:The light emitted from a light source 21 is bisected by a half mirrors 24.1. One light thereof passes the sample water 23 in a sample cell 22, is again bisected by a half mirror 24.2, and the ultraviolet light past a band-pass filter 25.1 enters a photoelectric transducer 26.1. The visible light past a band- pass filter 25.2 enters a photoelectric transducer 26.2. The respective photoelectrically converted outputs are introduced into preamplifiers 27.1, 27.2. The other of the light bisected by the half mirror 24.1. is bisected by a half mirror 24.3, and the bisected beams of the light are entered to photoelectric transducers 26.3, 26.4 respectively via band-pass filters 25.3, 25.4. These outputs are inputted to logarithmic converters 28.1, 28.2 and an operator 29, whereby the absorbance is calculated. |
