The mass spectrometry system, mass spectrometry manner, the ion source which ionizes

摘要

PROBLEM TO BE SOLVED: To provide a tandem mass spectrometer which can perform tandem mass spectrometry on a trace quantity of a sample to be analyzed with a system selecting ions to be analyzed or ions not to be analyzed together with the ions to be analyzed before a first stage mass spectrometry, even when a large quantity of foreign components are mixed into the sample.;SOLUTION: The mass spectrometry uses a first database storing data of candidate substances to be analyzed, and a high frequency power source applying a high frequency voltage to the substances to eliminate the ions not to be analyzed. Before a first stage mass spectrometry, the ions not to be analyzed are not listed in the first database or ions other than the ions to be analyzed coincident with those of a second database storing the data of candidate substances not to be analyzed are eliminated by the high frequency voltage, and then the mass spectrometry is performed.;COPYRIGHT: (C)2004,JPO