| 摘要 |
<p>An instrument for quantitative analysis includes two shutters (18, 34), one of which (18) prevents light from being introduced into a black box (10) housing a cell holder (26) from the outside through a port in which a cell (14) may be placed in and taken out the black box, and the other of which (38) prevents light from impinging on a photomultiplier tube (34) which is in communication with the black box. The shutters are controlled by means of a control unit so that one of the shutters opens when the other closes. The instrument also includes detectors (66a, 66b) which detect whether or not the cell holder (26) and the cell (14) are disposed at predetermined positions, respectively. The detectors output signals to the control unit. The control unit controls an automatic pipetting device (25) to restrict a sample from being introduced into the cell when both the cell holder and the cell are not disposed at the predetermined position.</p> |
