ICP Emission Spectrometer

摘要

An ICP emission spectrometer is schematically configured to include an inductively coupled plasma generation unit, a light condensing unit, a spectroscope, a detector, and a controller. The detector includes a photomultiplier and has a detector controller and an input unit. The photomultiplier has voltage dividing resistors, which make an amplification factor not to become constant immediately due to a change in an application voltage applied to the photomultiplier, but the detector controller controls an idle voltage and an idle voltage application time so that a multiplication factor becomes constant, during a period from when analysis conditions are input to the input unit in advance until a sample containing an analysis-targeted element is introduced into the inductively coupled plasma generation unit.

主权项

1. An ICP emission spectrometer comprising:
an inductively coupled plasma generation unit configured to atomize or ionize an analysis-targeted element using inductively coupled plasma to obtain atomic emission lines; a light condensing unit configured to converge the atomic emission lines; a spectroscope configured to detect the atomic emission lines by diffracting light after receiving the atomic emission lines through a light incident window; a detector configured to detect the light passing through the spectroscope; a detector controller configured to control a voltage applied to the detector and an application time of the voltage; and an input unit for receiving an operation input of analysis conditions corresponding to the analysis-targeted element, wherein the detector controller is configured to control the voltage applied to the detector and the application time thereof based on an idle voltage and an idle voltage application time corresponding to an expected power amount obtained from an analysis voltage applied to the detector and an analysis voltage application time under the analysis conditions during a period from when the analysis conditions are input to the input unit until a sample containing the analysis-targeted element is introduced into the inductively coupled plasma generation unit.