| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise detection of a background to provide a satisfactory analytical result, when interrupting electric power supply during intermittent power supply. SOLUTION: This glow discharge emission spectrophotometer detects light emission by spattering of a sample generated glow discharge by a plurality of photomultipliers provided inside a spectroscope. In each of the photomultipliers, detection sensitivity is regulated in response to a voltage value impressed by a high-voltage impression part of a detection processing part, automatic regulation for the detection sensitivity is turned on by an impression control part of the detection processing part in every time when supplying the electric power during the intermittent power supply, to impress the voltage by the high-voltage impression part, the automatic regulation for the detection sensitivity is turned off when interrupting the electric power supply during the intermittent power supply, and a nondetecting voltage is impressed to the respective photomultipliers, to prevent a noise of the background from being detected excessively when interrupting the electric power supply. COPYRIGHT: (C)2007,JPO&INPIT
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