| 摘要 |
PURPOSE:To make automatic correction of drift possible, by storing the input of an array type photodetector when a control liquid is passed into a flow cell, then calculating and displaying the difference of the input from the input when a sample is passed, and, on the other hand, renewing the storage through discriminating a subsequent control liquid. CONSTITUTION:Light from a light source 1 is passed through a condenser lens 2, and is transmitted through a flow cell 3. An array type photodetector 6 is arranged at the position of image-formation of the spectrum generated by a spectroscope composed of an incidence slit 4 and a concave diffraction grating 5. The signal outputted by the photodetector 6 is amplified by an amplifier 7, stored and calculated by a microcomputer 8 to display on a display 9 as spectrum. That is, since the computer 8 serves to discriminate whether the signal is the control signal or not, to store and renew the control signal, to calculate the ratio of the sample signal to the control signal, or the difference between them, and to display the output, it makes automatic correction of the drift possible, in spite of its mode of single beam. |
