Abstract: The mass spectrometer is characterized in that a linear ion trap, that consists of electrodes for mass-selective discharge, is provided with a mechanism that excites ions in a first direction that is perpendicular to the rod axes and a mechanism that simultaneously generates an electric field on the axes in a second direction that is perpendicular to the axial direction and the first direction in order to generate an electric field on the central axis. Highly efficient, high-speed scanning can be achieved using this configuration.

Abstract: An MS/MS spectrometric analysis method obtains throughput and mass resolving power of precursor ions. In a mass spectrometer, ions, which are introduced and accumulated in an ion trap unit, are resonance-extracted mass-selectively. A profile of precursor ions at the m/z axis of the ion trap and a profile at the mass analyzer portion, which performs mass analysis of the ions extracted from a collision induced dissociation portion, is obtained by performing a measurement when the injection energy to the collision induced dissociation portion is low, and when the injection energy to the collision induced dissociation portion is high. The profile at the m/z axis of the ion trap of the obtained two-dimensional spectrum is substituted with the profile at the m/z axis of the mass analyzer portion. In this way, the m/z of both the precursor ions and the fragment ions can be determined with high mass resolving power.

Abstract: A method of quickly detecting a handmade explosive in a bottle with a low erroneous alarm frequency is provided. A sample gas generated from a bottle placed on a bottle placement space is sucked-in, and ions of the sample gas are generated by an ion source and subjected to mass analysis. The presence/absence of a mass spectrum derived from the handmade explosive is determined from an obtained mass spectrum, and the result thereof is displayed on a monitor, thereby quickly detecting the handmade explosive in the bottle or the handmade explosive adhering to the surface of the bottle at a low erroneous alarm frequency.

Abstract: The present invention achieves accurate quantitative determination without reducing measurement throughput and also without having to add a multi-component reference standard. An analytical instrument of the present invention for determining the concentration of a target compound contained in a target sample includes: a means for ionizing a mixture having a specific compound added to the target sample; a means for performing mass analysis on resulting ions; and a database that stores dependence of signal intensity on the concentration of a specific matrix component for each of the target compound and the addition compound, wherein the database is used to calibrate the concentration of the target compound from a signal derived from the target compound and a signal derived from the addition compound, each signal obtained by the mass analysis means. The present invention achieves a multi-component analyzer using low-cost, high-throughput mass analysis, as compared to conventional technique.

Abstract: A linear trap having high ejection efficiency and low ejection energy is realized. In a mass spectrometer in which ions generated by an ion source are introduced to a quadrupole rod structure applied with RF voltage and ejected from the quadrupole rod structure so as to be detected by a detection mechanism, a mass dependent potential is formed in the axial direction of the quadrupole rod structure and ions are ejected mass selectively from the vicinity of a minimum point of the potential, the mass dependent potential being formed by applying electrostatic voltage and RF voltage to an insertion electrode inserted in the quadrupole rods.

Abstract: A mass spectrometer that is switchable to operate as a linear trap or as a mass filter, and attaining both high ejection efficiency when operated as a linear trap and high mass resolving power when operated as a mass filter. A mass spectrometer includes an ion source for ionizing a sample, a linear trap quadrupole rod lens supplied with ionized ions, a trap electrode for forming a potential to trap the supplied ions between one end of the quadrupole lens and the other end, a control unit to regulate the trap lens voltage, and a mass analyzer or detector to detect ions ejected from the linear trap, and characterized in switching between an operation where the supplied ions are trapped in a section quadrupole rod lens and ejected by the controller unit regulating the trap electrode voltage; and an operation where ions are selective passed through according to their mass.

Abstract: A low-cost and high-ion-transmission-ratio ion-mobility spectrometry filter, including an ion source, a first drift region in which a gas flow direction and a DC electric-field direction are opposite to each other, a second drift region in which a gas flow direction is provided, the gas flow direction being different from the gas flow direction in the first drift region, and being opposite to a DC electric-field application direction in the second drift region, an intermediate region having an electric field for causing ions to travel between the first drift region and the second drift region, and a detector for detecting ions which have passed through the first drift region and the second drift region.

Abstract: An MS/MS spectrometric analysis method obtains throughput and mass resolving power of precursor ions. In a mass spectrometer, ions, which are introduced and accumulated in an ion trap unit, are resonance-extracted mass-selectively. A profile of precursor ions at the m/z axis of the ion trap and a profile at the mass analyzer portion, which performs mass analysis of the ions extracted from a collision induced dissociation portion, is obtained by performing a measurement when the injection energy to the collision induced dissociation portion is low, and when the injection energy to the collision induced dissociation portion is high. The profile at the m/z axis of the ion trap of the obtained two-dimensional spectrum is substituted with the profile at the m/z axis of the mass analyzer portion. In this way, the m/z of both the precursor ions and the fragment ions can be determined with high mass resolving power.

Abstract: The present invention achieves accurate quantitative determination without reducing measurement throughput and also without having to add a multi-component reference standard. An analytical instrument of the present invention for determining the concentration of a target compound contained in a target sample includes: a means for ionizing a mixture having a specific compound added to the target sample; a means for performing mass analysis on resulting ions; and a database that stores dependence of signal intensity on the concentration of a specific matrix component for each of the target compound and the addition compound, wherein the database is used to calibrate the concentration of the target compound from a signal derived from the target compound and a signal derived from the addition compound, each signal obtained by the mass analysis means. The present invention achieves a multi-component analyzer using low-cost, high-throughput mass analysis, as compared to conventional technique.

Abstract: There has been a problem that both detection sensitivity and throughput cannot be improved simultaneously by a conventional MS/MS analysis method. A mass analyzer having an ion trap for ejecting ions in a specific mass range, a collisional dissociation part for causing ions ejected from the ion trap to be dissociated, a mass analyzing part for performing a mass analysis of ions ejected from the collisional dissociation part, and a control part including a list in which measurement conditions for each ion are stored selectively resonance-ejects ions introduced into and accumulated in the ion trap based on masses.

Abstract: A low-cost and high-ion-transmission-ratio ion-mobility spectrometry filter, including an ion source, a first drift region in which a gas flow direction and a DC electric-field direction are opposite to each other, a second drift region in which a gas flow direction is provided, the gas flow direction being different from the gas flow direction in the first drift region, and being opposite to a DC electric-field application direction in the second drift region, an intermediate region having an electric field for causing ions to travel between the first drift region and the second drift region, and a detector for detecting ions which have passed through the first drift region and the second drift region.

Abstract: A mass spectrometer that is switchable to operate as a linear trap or as a mass filter, and attaining both high ejection efficiency when operated as a linear trap and high mass resolving power when operated as a mass filter. A mass spectrometer includes an ion source for ionizing a sample, a linear trap quadrupole rod lens supplied with ionized ions, a trap electrode for forming a potential to trap the supplied ions between one end of the quadrupole lens and the other end, a control unit to regulate the trap lens voltage, and a mass analyzer or detector to detect ions ejected from the linear trap, and characterized in switching between an operation where the supplied ions are trapped in a section quadrupole rod lens and ejected by the controller unit regulating the trap electrode voltage; and an operation where ions are selective passed through according to their mass.

Abstract: A linear trap having high ejection efficiency and low ejection energy is realized. In a mass spectrometer in which ion generated by an ion source are introduced to a quadrupole rod structure applied with RF voltage and ejected from the quadrupole rod structure so as to be detected by a detection mechanism, a mass dependent potential is formed in the axial direction of the quadrupole rod structure and ions are ejected mass selectively from the vicinity of a minimum point of the potential, the mass dependent potential being formed by applying electrostatic voltage and RF voltage to an insertion electrode inserted in the quadrupole rods.