Mass spectrometer
AssigneeHitachi High-Technologies Corporation
InventorsYuichiro Hashimoto, Hideki Hasegawa, Takashi Baba, Hiroyuki Satake, Izumi Waki
Life of this patent
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Abstract
Amass spectrometer includes: an ion source for ionizing a specimen to generate ions, an ion transport portion for transporting the ions, a linear ion trap portion for accumulating the transported ions by a potential formed axially, and a control portion of ejecting the ions within a second m/z range different from a first m/z range, from the linear ion trap portion, and substantially at the same timing as the timing of accumulating the ions within the first m/z range from the transport portion into the linear ion trap portion. The ion transportation portion having a mass selection means for selecting the ions in the first m/z range.
Claims8
A mass spectrometer comprising:
- an ion source for ionizing a specimen to generate ions;
- an ion transport portion, positioned on the latter part of the ion source and provided with mass selection means for selecting the ions of a first m/z range, for transporting the ions;
- a linear trap portion for accumulating the transported ions by a potential formed axially;
- and
- a control portion for controlling the linear trap portion to eject the ions within a second m/z range different from a first m/z range from the linear trap portion substantially at the same timing as the timing of accumulating the ions within the first m/z range to the linear trap portion,
- wherein the transmission m/z window within the first m/z range transmitting the ion transport portion by the mass selection means is set by the previously measured mass spectrum of the ions introduced to the linear trap portion.
A mass spectrometry method comprising:
- a step for ionizing a specimen by an ion source to generate ions;
- a step for transporting mass selectively the ions by an ion transport;
- a step for introducing the transported ions to a linear trap portion;
- a step for accumulating the introduced ions into the linear trap portion;
- and
- a step for ejecting the ions within a second m/z range different from the first m/z range from the linear trap portion substantially at the same timing as the timing of accumulating the ions within the first m/z range to the linear trap portion,
- wherein, in the transporting step, the transmission m/z window within the first m/z range transmitting the ion transport portion is set by the previously measured mass spectrum of the ions introduced to the linear trap portion.
Dependencies are inferred from the claim text.