In the plasma ion source mass spectrometry device which is used in the mass spectrometry

摘要

PROBLEM TO BE SOLVED: To precisely correct isotope ratios in a plasma ion source mass analysis, where a quadruple mass spectrometer (QMS), such as a three-dimensional quadruple mass spectrometer (3DQMS), is mounted to a mass analyzer section.;SOLUTION: The plasma ion source mass analyzer performs measurement, by using the quadruple mass spectrometer (QMS), such as the three-dimensional quadruple mass spectrometer (3DQMS), for the mass analyzer section by using ICP or MIP, and other ion sources for the ion source. At least two standard substances, having different isotope ratios, are used to obtain the theoretical value to the measurement value for each isotope ratio for displaying on a screen, the interpolation relational expression between both of them is displayed on the screen, a measurement value for the measurement sample is measured, and the correction value of the isotope ratio is indicated on the screen from the measured measurement value and the interpolation relationship.;COPYRIGHT: (C)2005,JPO&NCIPI