Shimadzu Corporation

Yusuke Tateishi

Hiroyuki Miura

Yoshihiro Ueno

Hideaki Izumi

Kazuteru Takahashi

Hideki Sato

Ryugo Maeda

An MT-TOFMS which is one mode of the present invention includes: a linear ion trap () configured to temporarily hold ions to be analyzed, and to eject the ions through an ion ejection opening () having a shape elongated in one direction; a loop flight section () configured to form a loop path (P) capable of making ions repeatedly fly; and a slit part () located on an ion path in which the ions ejected from the linear ion trap () travel until the ions are introduced into the loop path, the slit part configured to block a portion of the ions in a longitudinal direction of the ion ejection opening ().

Multi-turn time-of-flight mass spectrometer

Provided is a time-of-flight mass spectrometer including: a loop-orbit defining electrode () including an outer electrode () and inner electrode () located on the outside and inside of a loop orbit, respectively; an ion inlet (); an ion outlet () provided in either the outer or inner electrode; a loop-flight voltage applier () configured to apply loop-flight voltages to the outer and inner electrodes, respectively; a set of deflecting electrodes () facing each other across a section of an n-th loop orbit, where n is a predetermined number, the deflecting electrodes including a first portion () which faces the n-th loop orbit and a second portion () which includes other portions; and a voltage applier () configured to apply deflecting voltages to the first portion so as to reverse the drifting direction of the ions flying in the n-th loop orbit, and a voltage to the second portion so as to create the loop-flight electric field.

Time-of-flight mass spectrometer

A mass spectrometer including: an ionization chamber () that generates ions from a sample, a collision cell () located downstream from the ionization chamber (), a mass separation unit () located downstream from the collision cell (), an energy barrier unit () located between the collision cell () and the mass separation unit (), a voltage application unit () that applies a voltage to each of the ionization chamber (), the collision cell (), and the energy barrier unit (), and a control unit () that controls the voltage application unit () such that a potential of the ionization chamber () is set to a first potential, a potential of the collision cell () is set to a second potential that is lower than the first potential, and a potential of the energy barrier unit () is set to a third potential between the first potential and the second potential.

Mass spectrometer

In an ion sourcein which a repeller electrodefor forming a repelling electric field that repels ions toward an ion emission portis provided inside of an ionization chamberion focusing electrodesandare respectively arranged between an electron introduction portand a filamentand between an electron discharge portand a counter filamentAn electric field formed by applying a predetermined voltage to each of the ion focusing electrodesandintrudes into the ionization chamberthrough the electron introduction portand the electron discharge portand becomes a focusing electric field that pushes the ions in an ion optical axis C direction. Ions at positions off a central part of the ionization chamberreceive the combined force of the force of the repelling electric field and the force of the focusing electric field, and move toward the ion emission portwhile approaching the ion optical axis C. Accordingly, the amount of ions sent out from the ion emission port increases. Further, even if a charge-up phenomenon occurs, the ion trajectories less easily change, and the stability of the sensitivity can be enhanced.

Growing community of inventors

Kyoto, Japan

Yusuke Tateishi