[특허]Mass spectrometry method using notch filter

Mass spectrometry method using notch filter 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01J-049/42
출원번호	US-0662217 (1991-02-28)
발명자 / 주소	Kelley Paul E. (San Jose CA)
출원인 / 주소	Teledyne CME (Mountain View CA 02)
인용정보	피인용 횟수 : 39 인용 특허 : 0

초록 ▼

A mass spectrometry method in which notch-filtered noise is applied to an ion trap to resonate all ions except selected ions out of the region of the trapping field. Preferably, the trapping field is a quadrupole trapping field defined by a ring electrode and a pair of end electrodes positioned symmetrically along a z-axis, and the filtered noise is applied to the ring electrode to eject unwanted ions in radial directions rather than toward a detector mounted along the z-axis. Also preferably, the trapping field has a DC component selected so that the trapping field has both a high frequency and low frequency cutoff, and is incapable of trapping ions with resonant frequency below the low frequency cutoff or above the high frequency cutoff. Application of the filtered noise signal to such a trapping field is functionally equivalent to filtration of the trapped ions through a notched bandpass filter having such high and low frequency cutoffs. Application of filtered noise in accordance with the invention avoids accumulation of contaminating ions during the process of storing desired parent ions, and permits ejection of unwanted ions in directions away from an ion detector to enhance the detector\s operating life and rapid ejection of unwanted ions having mass-to-charge ratio below a minimum value, above a maximum value, and outside a window determined by the filtered noise signal.

대표청구항 ▼

A mass spectrometry method, including the steps of: (a) establishing a trapping field capable of storing parent ions and daughter ions having mass-to-charge ratio within a selected range within a trap region bounded by a set of electrodes; (b) applying a filtered noise signal to at least one of the electrodes to resonate out of the trap region unwanted ions having mass-to-charge ratio within a second selected range, wherein the trapping field is a three-dimensional quadrupole trapping field, wherein the electrodes include a ring electrode and a pair of end electrodes, wherein step (a) includes the step of applying a fundamental voltage signal to the ring electrode to establish the trapping field, and wherein step (b) includes the step of: applying the filtered noise signal to the ring electrode to resonate the unwanted ions out of the trap region in radial directions, toward the ring electrode, and wherein the selected range corresponds to a trapping range of ion frequencies, wherein the filtered noise signal has frequency components within a lower frequency range from a first frequency up to notch frequency band, and within a higher frequency range from the notch frequency band up to second frequency, wherein the frequency range spanned by the first frequency and the second frequency includes said trapping range, wherein the fundamental voltage signal has a radio frequency component and a DC component having an amplitude, wherein the amplitude of the DC component is chosen to establish both a desired low frequency cutoff and a desired high frequency cutoff for the trapping field, and wherein the first frequency is not significantly lower than the low frequency cutoff and the second frequency is not significantly higher than the high frequency cutoff.

이 특허를 인용한 특허 (39)

Wells,Gregory J., Adjusting field conditions in linear ion processing apparatus for different modes of operation.
상세보기
Yoshinari, Kiyomi; Kato, Yoshiaki; Nakagawa, Katsuhiro; Nagai, Shinji, Apparatus for mass spectrometry on an ion-trap method.
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Yoshinari,Kiyomi; Kato,Yoshiaki; Nakagawa,Katsuhiro; Nagai,Shinji, Apparatus for mass spectrometry on an ion-trap method.
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Goren, Yehuda G.; Chen, Tong, Asymmetrical slow wave structures to eliminate backward wave oscillations in wideband traveling wave tubes.
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Brown, Jeffery Mark; Green, Martin Raymond; Pringle, Steven Derek; Wildgoose, Jason Lee, Device allowing improved reaction monitoring of gas phase reactions in mass spectrometers using an auto ejection ion trap.
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Ward Ronald K. (600 W. Fredericksburg Broken Arrow OK 74011) Ward William M. (10700 S. Lynn La. Broken Arrow OK 74011), Drinking cup device.
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Rafferty, David, Driving a mass spectrometer ion trap or mass filter.
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Baba, Takashi; Hashimoto, Yuichiro; Waki, Izumi, Electric charge adjusting method, device therefor, and mass spectrometer.
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Rafferty, David, End cap voltage control of ion traps.
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Rafferty, David, End cap voltage control of ion traps.
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Wells,Gregory J., Field conditions for ion excitation in linear ion processing apparatus.
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Wang,Mingda; Lee,Doris; Newton,Kenneth; Schachterle,Steve, High-resolution ion isolation utilizing broadband waveform signals.
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Wells,Gregory J., Increasing ion kinetic energy along axis of linear ion processing devices.
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Kodera, Kei; Hazama, Makoto, Ion selection method in ion trap and ion trap system.
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Taniguchi, Junichi, Ion trap mass spectrometer.
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Wells, Gregory J., Ion trap mass spectrometer using pre-calculated waveforms for ion isolation and collision induced dissociation.
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Baba Takashi (Hatoyama-machi JPX) Waki Izumi (Asaka JPX), Ion trapping mass spectrometry method and apparatus therefor.
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Quarmby,Scott T.; Schwartz,Jae C.; Syka,John E. P., Isolating ions in quadrupole ion traps for mass spectrometry.
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Marriott, Philip, Mass spectrometer and mass filters therefor.
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Kenny, Daniel James, Mass spectrometer arranged to perform MS/MS/MS.
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Kenny, Daniel James, Mass spectrometer arranged to perform MS/MS/MS.
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Kenny, Daniel James, Mass spectrometer arranged to perform MS/MS/MS.
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Kelley Paul E. (San Jose CA) Louris John N. (Santa Clara CA), Mass spectrometry method with two applied trapping fields having same spatial form.
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Kelley Paul E. ; Louris John N., Mass spectrometry method with two applied trapping fields having the same spatial form.
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Marriott, Philip, Means for removing unwanted ions from an ion transport system and mass spectrometer.
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Schubert Michael,DEX ; Franzen Jochen,DEX, Method for controlling the ion generation rate for mass selective loading of ions in ion traps.
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Hoekman Doneil J. (Gilroy CA) Kelley Paul E. (San Jose CA), Method for generating filtered noise signal and braodband signal having reduced dynamic range for use in mass spectromet.
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Wells Gregory J. (Fairfield CA), Method of detecting selected ion species in a quadrupole ion trap.
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Buttrill ; Jr. Sidney E., Method of operating an ion trap mass spectrometer.
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Ding,Li; Nuttall,James Edward, Methods and apparatus for driving a quadrupole ion trap device.
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Williams, Anthony David, Noise canceling technique for frequency synthesizer.
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Bar-Or, Raphael, Noise reducing/resolution enhancing signal processing method and system.
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Mcluckey, Scott A.; Chrisman, Paul A.; Pitteri, Sharon J., Parallel ion parking in ion traps.
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Remes, Philip M.; Schwartz, Jae C., Prolonged ion resonance collision induced dissociation in a quadrupole ion trap.
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Wells,Gregory J., Rotating excitation field in linear ion processing apparatus.
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Goren, Yehuda G.; Lally, Philip M., Slow wave structure having offset projections comprised of a metal-dielectric composite stack.
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Hidalgo, August; Poulton, Ken, Summed time-of-flight mass spectrometry utilizing thresholding to reduce noise.
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Remes, Philip M.; Schwartz, Jae C., Systems and methods for ion isolation.
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Remes, Philip M.; Senko, Michael W.; Schwartz, Jae C., Systems and methods for ion isolation using a dual waveform.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Mass spectrometry method using notch filter 원문보기

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Mass spectrometry method using notch filter 원문보기

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이 특허를 인용한 특허 (39)

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